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BULLETIN No. 8 

UTAH ENGINEERING EXPERIMENT STATION 
DEPARTMENT OF METALLURGICAL RESEARCH 

JUNE, 1916 


PATENTS RELATING 

TO 

OIL-FLOTATION 



BY 


R. S. LEWIS and O. C. RALSTON 



STATE SCHOOL OF MINES, UNIVERSITY OF UTAH 


IN CO-OPERATION WITH 

UNITED STATES BUREAU OF MINES 


J 

SB 




THE UNIVERSITY PRESS. SALT LAKE CITY 


















Utah Engineering Experiment 

Station 

The Utah Engineering Experiment Station was estab¬ 
lished by an Act of the State Legislature in March, 1909, as 
a department of the State School of Mines, the engineering 
college of the University of Utah. The station is author¬ 
ized ‘"to carry on experiments and investigation, pertain¬ 
ing to any and all questions and problems that admit of lab¬ 
oratory methods of study, and a solution of which would tend 
to benefit the industrial interests of the State or would be 
for the public good.^^ 


The following bulletins have been published: 

Bulletin No. 1. Test of Utah Brick. (Out of print.) 

Bulletin No. 2. Tests of Macadam Rock. 

Bulletin No. 3. The construction and Maintenance of 
Earth Roads. 

Bulletin No. 4. The Economical Design of Reinforced 
Concrete Beams. 

Bulletin No. 5. Measurement of Flowing Streams. A 
Simple, Accurate Method of Using the Weir. 

Bulletin No. 6. Leaching a Lime-Zinc Ore with Acids. 

Bulletin No. 7. Results of Experiments on Sewer Pipe 
and Drain Tile. 

Bulletin No. 8. Patents Relating to Oil-Flotation Pro¬ 
cesses in Cooperation with U. S. Bureau of Mines. 

JOSEPH F. MERRILL, Director. 


BULLETIN No. 8 

UTAH ENGINEERING EXPERIMENT STATION 
DEPART.MENT OF METALLURGICAL RESEARCH 

JUNE. 1916 


PATENTS RELATING 

TO 

OIL-FLOTATION 

PROCESSES 

BY 

R. S. LEWIS and O. C. RALSTON 



* * 

«> •> 

STATE SCHOOL OF MINES, UNIVERSITY OF UTAH 

IN CO-OPERATION WITH 

UNITED STATES BUREAU OF MINES 







TH5-£3 

• Li 


PREFATORY NOTE. 


In January of this year, the School of Mines and Metallurgy of 
the University of Missouri issued a bibliography on “Concentrating 
Ores by Flotation.” Pages 55 to 90 of this bibliography contain an 
annotated list of the important British and United States patents ar¬ 
ranged chronologically. 

In making up the annotated list of patents given in this bulletin, 
the list given in the bulletin of the School of Mines and Metallurgy 
of Missouri was used as a basis. This list has been revised and en¬ 
larged, and although it is not entirely complete, it is believed to be 
more complete than any list hitherto published. There are many flo¬ 
tation patents that are buried in title and are only beginning to ap¬ 
pear. Further, some of the patents in the list do not seem to be very 
closely related to the subject, but they cover ideas that might be ap¬ 
plied to flotation processes. 

These patents can be purchased from the Patent Office in Wash¬ 
ington, D. C., at a cost of 5 cents each, and the whole set can be bound 
comfortably into two volumes. 

This brief list is part of a more extended paper on the subject 
that is to appear later as part of a bulletin issued by the United States 
Bureau of Mines. 


D. of D. 

MAY 22 1917 





O 

\A 

QO 


PATENTS RELATING TO OIL-FLOTATION PROCESSES. 
By R. S. Lewis and 0. C. Ralston. 


The possibilities of the oil-flotation processes and the litigration 
that has arisen over the various methods of flotation has created wide¬ 
spread interest in the different patents that have been taken out on 
this method of ore concentration. The litigation has served to show 
that many very good ideas have been buried in the patent literature 
on flotation. There is now a tendency to dig them all out and test 
them in the light of present-day knowledge. 

As long as flotation is such an empirical art as it is at present, 
every idea promising practical results will have to be tried, and ex¬ 
periments will subsequently have to be repeated if new facts seem to 
show that the first experiments should be performed under slightly 
different conditions. Thus every researcher in flotation is endeavor¬ 
ing to obtain patents on the subject in order that he can find new ideas 
or that his own thought will be stimulated. It is said that the patents 
of Mrs. Everson have been shown to be practical with present-day ma¬ 
chinery, and her machinery is said to have needed only minor changes 
in order that she might have operated at a profit and made a success 
of her ideas. Later knowledge of oils and flotation machinery has al¬ 
lowed the application of her ideas almost in the whole. Such an illustra¬ 
tion indicates why investigators are reviewing work done in the past. 

Although the reading of the patents in their chronological order 
does not give the true history of flotation there is nevertheless a con¬ 
siderable story visible between the lines in the development of ideas 
that have resulted in the present-day successes of the process. On 
that account the patents are not classified but are given in the order 
of their appearance from the patent office. 

207,695. September 3, 1879. John Turnbridge of Newark, N. J. 

Separating metals from waste solution. A process for separating 
from water used by jewelers for washing, and from other water, the 
precious metals contained therein. The waste water is first subjected 
to a bath of oil or hydrocarbon oil, in order to separate the soapy mat¬ 
ter contained in the water and to collect the mineral particles. The 
water, thus treated, is passed through a combustible filter, which is 
ignited and the metals collected. 

244,569. July 19, 1881. P. H. Dunagan, Boulder, Colo. Apparatus for 

Recovering Precious Metals. 

When saponine or a saponified oil or fat is brought in contact with 
precious metals suspended in water or other liquid, such as jewelers’ 
and miners’ waste water, a coagulum is formed that contains the 
precious metals. The water should first be settled to remove all pos¬ 
sible earthy and non-metallic matter. If the water is soft or alkaline 
an addition of a salt or an acid is necessary to cause coagulation. The 
coagulum is then filtered through any vessel containing shavings, saw- 



4 


ABSTRACTS OF PATENTS 


dust, grass, or the like; the filter is dried and burned and the metal is 
recovered from the ashes by melting in a crucible. 

244,569. July 18, 1881. P. H. Dunagan, Boulder, Colo. Aparatus for 
Utilizing the Scum from Pulverized Ores. (Assignor to Aaron 
McCraw, Boulder, Colo.) 

When pulverized ore is concentrated some of it floats on the sur¬ 
face of the water as a scum. This scum goes to waste, though it is 
generally rich in valuable minerals. Between the pulverizer and the 
concentrating machine, an apparatus, in the form of a rectangular set¬ 
tling tank, fitted with baffles, is provided through which the water is 
made to flow in such a manner that the floating minerals are caused 
to settle to the bottom of the tank, and are recovered. 

251,718. January 3, 1882. A. E. Jones, Newark, N. J. Apparatus for 
Separating Gold from Quartz and Rock Tailings. (Assignor to 
himself, J. T. Rowland, and R. Gray, Newark, N. J.) 

An apparatus for separating gold from quartz and rock tailings, 
comprising a tank containing a filter drum covered with wire cloth, 
so constructed that any fluid must pass through the filtering sur¬ 
face of the drum in order to escape from the tank. Above the tank, 
a broad endless belt or felt blanket is made to pass around a num¬ 
ber of rollers, one of which presses the belt against the face of the 
filter drum. Any fibrous material that will form a pulp when mixed 
with water is placed in a mixing vessel from which it flows into 
the above mentioned tank. The ore tailing is ground in a pugmill, 
and after passing through a settling box whose function it is to 
catch all heavy lumps, the lighter part and the floating precious 
metal pass in to the tank, but on the side opposite to that where 
the fiber pulp enters. A paddle-wheel stirrer keeps the ore well 
agitated. As the drum revolves it first picks up the fiber pulp, 
which in turn catches the fine ore and gold, carrying it up until 
it comes in contact with the felt blanket. This blanket picks off 
the mineral-bearing pulp and carries it between a set of rolls which 
press out much of the contained water (the water being returned 
to the tank). The adhering pulp is now removed from the belt by 
a scraper and when a sufficient quantity has accumulated, it is 
burned and the gold extracted. 

251,914. January 3, 1882. William Moller, New York, N. Y. Amal¬ 
gamator. 

An improved amalgamator in which the mixed pulp and mer¬ 
cury are subjected to the triturating action of revolving mullers. 
The amalgamating pan is provided with a discharge orifice, through 
which any floating particles of metal pass into suitable traps. In 
the traps are revolving cloth-covered rollers of sufficient diameter 
to extend above the surface of the water. The floating particles 
are caught on the surface of the rollers and are carried down into 
the mercury contained in the bottom of the traps. 


OIL-FLOTATION PROCESSES 


267j351. Nov. 14, 1882. Alfred E. Jones, of Newark, New Jersey, 
assignor to himself, John T. Rowland, and Robert Gray, Jr., of 
same place. (Process of Collecting the Floating Precious Metal 
from Quartz or Cement-Rock Tailings. 

Process of collecting and obtaining float-gold from quartz or ce¬ 
ment-rock tailings which consists in, first, passing into such tailings a 
fibrous pulp, such as cotton or wool; secondly, withdrawing the fibrous 
material and the matter commingled therewith; next, pressing the 
water from the same; and finally, destroying the fibrous material. 

268,325. Nov. 28, 1882. Elijah Warne, Easton, Pa. Concentrator and 
Separator for Ores. 

Describes an improvement on a concentrator and separator for 
ores (Patent No. 258, 332, May 23, 1882). The improvement con¬ 
sists in deflecting the fine, floating mineral particles from the con¬ 
centrator by a suitably directed stream of water, so that the float 
and any contained heavier particles first pass through a settling tank 
and then into a receiving box. In this box is a “skimmer’’ or launder 
so arranged as to carry off the surface stratum of water together 
with the floating material and convey it to a filtering box, where the 
solid material is caught on the filter cloth. 

326,808. September 22, 1885. H. P. Tobey and G. B. Thayer, Boston, 
Mass. Ore Concentrator. Assignors to Golden Gate Concentrator 
Co., Boston, Mass. 

A reciprocating ore concentrating table, provided with a sep¬ 
arate feeding device in the form of a paddle wheel revolving in a 
trough. Pulverized ore mixed with water is fed in on one side 
of the trough. Any floating scum is caught by the paddle blades 
and carried down and around to the discharge opening on the other 
side. This opening is just below the level of the water. All par¬ 
ticles are thus thoroughly wetted and are more easily saved by the 
concentrating table. 

345,951. July 20, 1886. Hezekiah Bradford, of Philadelphia, Penn. 

Method of saving floating materials in ore-separation consist¬ 
ing in passing the water and film of floating materials along in an 
open unobstructed sheet from the table or separating-machine with 
but little agitation of the water, thus preventing such materials 
from being carried beneath the surface and subsiding, then causing 
the water and floating materials to plunge or fall into a water re¬ 
ceptacle, and then retaining said floating materials in said receptacle 
until they lose their floating power and sink. Merely a method of 
saving any film of floating minerals formed accidentally in ore dress¬ 
ing operations. 

348,157. August 24, 1886. Carrie Everson, Chicago, Ill. (Process of 
Concentrating Ores.) 

The Everson patent so often mentioned in litigation and ad¬ 
judged to disclose the essentials of froth floatation. The pulverized 


I) 


ABSTRACTS OF PATENTS 


ore mixed dry with an oil amounting to from 5 to 17 per cent by 
weight of the ore. The dough of oil and ore is then “thoroughly 
agitated” in water to wash out the gangue and allow the oiled 
mineral to float off. No direct mention of a froth or foam is made, 
but the amount of oil is too small to allow of bulk oil flotation and 
directions to “thoroughly agitate” with water lead us to infer that 
air bubbles will be entertained in the oiled masses of sulphides. 

.373,113. November 15, 1887. H. J. Wagner, Dayton, Mo. (Churn). 

A churn fitted with two spiral bladed dashers, revolving in 
opposite directions, and so designed that the cream is lifted from 
the bottom and thrown upward and outward in giving it a semi¬ 
circular motion, which is continually intercepted in every direction 
by counter currents from the oppositely revolving dasher, causing a 
thorough and equal agitation of the whole mass. In this movement 
air behind and under the blades, and oxygen of the air comes in 
contact and freely combines with every particle of cream. 

379,418. March 13, 1888. J. Sandon, Virginia City, Mont. (Ore Con¬ 
centrator.) 

An ore concentrator for saving the valuable floating ore par¬ 
ticles, consisting of a primary settling tank with a circular over¬ 
flow launder discharging into an attached secondary settling tank. 
The primary tank is fed with ore by a launder fitted with a hori¬ 
zontal partition, the purpose of which is to separate the lighter 
floating portion from the heavier material and convey them to dif¬ 
ferent parts of the primary settling tank. The light material passes 
to the top of said tank, thence through the discharge opening into 
the secondary tank, where it is first made to flow downward beneath 
the surface of the water through a passage fitted with baffles, and 
then up into the main part of the tank. 

386,504. July 24, 1888. G. Sweanor, Kingston, N. M. (Method of 
Separating Metals from Quartz or Gangue.) 

If finely pulverized quartz containing metal is placed in a ves¬ 
sel filled with water and a liquid insoluable in water and which is of 
greater density than water, but of less density than the quartz or 
gangue, the quartz, though of greater density than the insoluble 
liquid, will float on the surface of the liquid at the bottom of the 
water, while the metal particles precipitate through the insoluble 
liquid to the bottom of the vessel. Among the many liquids that 
may be used are: Carbon bisulphide, chloroform and oil of cloves. 

397,585. February 12, 1889. J. D. Coplen, Denver, Colo. (Combined 
Separator and Concentrator.) 

An apparatus for saving the floating values and slimes from 
ores, comprising a tank fitted with baffles so arranged as to cause 
the pulp to flow downward and then upward through the several 
compartments. The first compartment is used as a settler to sep¬ 
arate the heavier and worthless gangue from the lighter material. 


OIL-FLOTATION PROCESSES 


7 


which passes on into the other compartments. In these it either col¬ 
lects at the top, where it accumulates until it becomes heavy enough 
to sink to the bottom, or it endeavors to pass into the next compart¬ 
ment along with the water, but is caught on a filtering screen, which 
permits only the water to pass through. 

404,521. June 4, 1889. P. H. Dunagan, Denver, Colo. (Slime Sep¬ 
arator.) 

An apparatus for separating and saving the valuable slimes and 
float found in ores. The pulverized ore is fed into an inverted pyra¬ 
midal shaped box, and the heavier portion sinks and is drawn off 
through a discharge opening at the apex of the box. A suitably 
actuated arm gives a gentle wave-like motion to the surface of the 
water in the box, thereby washing the floating minerals against the 
surface of a moving endless belt of wool fabric. The belt picks 
up the float and conveys it to a tank of water, where the material 
is removed. The removal is facilitated by a side shaking motion 
imparted to the belt. 

414,962. November 12, 1889. H. J. Anderson, St. Louis, Mo. (Ore 
Concentrator.) 

An apparatus for separating the precious metals from refuse 
ores, comprising a trough shaped receptacle which contains a liquid 
of greater density than the refuse ore, but of less density than the 
valuable minerals. The ore is fed in at one end of the trough, and, 
on passing toward the other end, the valuable minerals settle down 
through the liquid to the bottom of the trough.* At suitable inter¬ 
vals, the liquid is drained from the tank. The minerals are retained 
on screens over the drain openings, and are easily collected. 

444,345. January 6, 1891. E. R. Gabbett, Old Charleton, England. 
(Apparatus for Mixing Liquids). Assignor of one-half to S. B. 
Boulton, T. B. Haywood and H. E. Boulton, London, England. 

An apparatus for mixing liquids or a liquid by the action of 
centrifugal force, whereby the liquid is continuously withdrawn 
from the bottom of the vessel and delivered at the top, or vice 
versa. This is the mixer originally used in the Cattermole process. 

454, 116. June 16, 1891. J. S. Lurie, Kansas City, Mo. (Liquid for 
Separating Metal from Quartz). 

Separating metals from ores by means of an artifically prepared 
liquid of greater specific gravity than the gangue, but of less spe¬ 
cific gravity than the metals. The gangue is floated off, while the 
metallic particles sink to the bottom and are recovered. 

461,425. October 20, 1891. F. M. Endlich, Ouray, Colo. (Ore Con¬ 
centrator.) 

An apparatus comprising a sluice along which the crushed ore 
and water pass and a belt carrying brushes at certain intervals, the 
motion of the belt being in an opposite direction to that of the water 
in the sluice. The height of the belt above the water is adjustable 


8 


ABSTRACTS OF PATENTS 


so that brushes can be made to just skim the water or to pass along 
partly or wholly submerged. The brushes act as agitatiors and col¬ 
lectors, mechanically carrying the floating or suspended particles 
into proper receptacles 

466,753. Jan. 5, 1892. Edgar A. Hockley, of Ouray, Colo. (Ore 

Slimer.) 

An ore separator or slimer consisting of a receiving-tank pro¬ 
vided with an inclined screw conveyor, a separating-tank provided 
with perforated pipes located at or near its bottom, and a stand-pipe 
connected therewith, said tank being provided with a top and bot¬ 
tom discharge, a vertically-movable gate provided with valves and 
floats, whereby the discharge of material from the tank is automat¬ 
ically regulated, and a suitable filtering-tank, the three tanks being 
arranged and connected substantially as and for the purpose set 
forth. This apparatus is designed to save floating films of such 
minerals as flour gold. 

469,599. February 28, 1892. Albion M. Rouse, of Boulder, Colorado. 

(Method of and Apparatus for Separating Slime or Fines from 

Water Used in Milling Ores.) 

Assignor to George R. Williamson, of same place. An improved 
method consisting in depositing the mill-tailing into a receptacle 
through which there is an upward flow of water, then carrying the 
water and tailing through a chamber, and causing an upward flow 
of air through the body of water and tailing, forming a scum of 
all the solids held suspended in the water. 

471,174. March 22, 1892. Charles B. Hebron and Carrie J. Everson, of 
Denver, Colo. (Process of Concentrating Ores.) 

A process for concentrating ores, which consists in first joining 
the metallic and mineral particles in the pulverized ore with a 
quantity of buoyant material, such as graphite, wool, sodium oleate, 
etc., and then sifting or blowing the prepared ore while in a dry 
state upon the surface of a liquid having an “effervescent condition’' 
whereby the buoyed metallic and mineral particles are made to float 
and thus separate from the gangue, which settles. Probably equiv¬ 
alent to film and to bulk oil flotation. 

474,829. March 17, 1892. Charles B. Hebron, of Denver, Colorado. 

(Process of Concentrating Ores.) 

Assignor of five-seventh to Carrie J. Everson, of same place, 
Mamie W. Hutchinson, of Topeka, Kansas, and Charles T. Brown, 
of Chicago, Illinois. The dry ore is subjected to heat and vacuum 
to remove adhering gases from pores and surfaces of the metallic 
mineral particles, and then treated with a “stock” of buoyant ma¬ 
terial, the stock adhering selectively to the particles of such min¬ 
eral. On presentation to a liquid surface the buoyed minerals float 
and the gangue sinks. 


OIL-FLOTATION PROCESSES 


y 


486,485. November 22, 1892. Axel W. Nibelious, of Hackettstown, 
N. Jersey. (Method of and Apparatus for Separating Graphite 
or Like Substance from Crushed Rock.) 

The process of separating graphite and like substances from 
the crushed rocks, which consists in causing a falling body of dry 
and crushed rock to meet a vertically and upwardly moving body 
or stream of water at the surface of and within a surrounding body 
of comparatively still water, on which surface the flakes of graphite 
or other substance not absorbing water are separated and are floated 
off on the overflowing water, while the water-absorbing particles 
are precipitated in the water. Probably film flotation. 

502,902. August 8, 1893. G. R. Evans. San Francisco, Cal. (Amal¬ 
gamation of Precious Metals.) 

Assignor one-half to B. Zehnder, San Francisco, California. 

An improved process of amalgamation, whereby a mixture of lime, 
carbonate of soda and oil or other unctuous matter, is introduced 
into the amalgamating pan, with the result that the mercury is kept 
bright and clean, and is prevented from becoming floured and car¬ 
ried off. 

521,899. June 26, 1894. J. W. Sutton. Chelmer, Queensland. 
(Process.) 

A process for separating gold from its chloride solutions. An 
alkali, such as a saturated solution of borax, is added to the gold 
solution, then a hydrocarbon fluid, preferably a cheap mineral oil 
as kerosene. After agitation,the gold is precipitated by adding sul¬ 
phate of iron. Dilute sulphuric acid is then added. Its function is 
to dissolve the iron precipitated by the alkali, increase the density 
of the solution, and free the oil so it can carry the precipitated gold 
particles to the surface of the liquid. The gold is recovered by 
filtering, be used it is not necessary to add the sulphate of iron, 
but the operation is facilitated by heating the solution, to about 
180 degrees farenheit. 

560,552. May 19, 1896. H. P. Tobey and G. B. Thayer, Boston, Mass. 
(Ore Concentrator.) 

An improved ore concentrator having for its object the reducing 
of slime losses, by devices designed for the following purposes: 
First, to effect the preliminary removal from the mass of the pulp 
to be treated of the so-called “float” material; second, to lessen the 
amount of wash water required by removing the larger part of the 
upper layer of gangue by mechanical devices and to diminish the 
steepness of the inclined part of the ore bed whereon the washing 
takes place; third, to deliver the wash water required for the re- 
movel of the last traces of gangue in such a manner as not to dis¬ 
turb the fine material, as it approaches the upper part of the wash¬ 
ing incline. 


10 


ABSTRACTS OF PATENTS 


575,669. January 19, 1897. George Robson, of Dolgelly, England. 
(Separation of Metals and Metallic Compounds from Ores or Other 
Substances.) Assignor to himself, and Samuel Crawder, of Lon¬ 
don, England. 

The method of recovering metals and metallic compounds from 
finely-divided ores, which consists in thoroughly and mechanically 
agitating and mixing a fatty oil of low specific gravity with said sub¬ 
stances while the same are in a moist or platic state due to admixture 
of water therewith, then floating off the fatty oil, carrying the metal 
particles, and metallic compounds from the ores, and then separat¬ 
ing the metals and metallic compounds from the oil. Bulk oil flota¬ 
tion. 

577,825. February 23, 1897. J. H. McCoy, Ouray, Colo. (Apparatus 
for Treating Ores.) 

An apparatus for saving the fine metalliferous particles from 
mill tailing. A series of inverted conical tanks are employed, each of 
which is provided with a bottom discharge pipe at the apex of the 
cone, and a feed and overflow pipe at the top. The tanks are arranged 
in stepped order, so that a tank is slightly lower in elevation than the 
preceding tank, thus making the overflow from one tank the feed pipe 
to the next. By suitably arranged piping compressed air can be re¬ 
leased in a number of small jets at the middle joint of each tank. When 
the feed reaches the first tank, the heavier particles sink and are car¬ 
ried out through the bottom discharge to be treated on vanners or 
other suitable machines. The lighter particles are carried upward by 
the ascending air bubbles and overflow into the next tank. The air 
pressure is graduated so that it is less in one tank than in the pre¬ 
ceding one. 

653,340. July 10, 1900. Francis E. Elmore, Leeds, Eng. (Apparatus 
for Separating Metallic from Rocky Constituents of Ores.) 

An apparatus for bulk oil flotation utilizing 100 to 300 per cent 
of any thick or tarry oil of low specific gravity, in which the metallic 
minerals of the ore will be entrapped and floated. Probably the first 
commercially successful process. 

655,338. August 7, 1900. Denis Gale, of Denver, Colo. (Apparatus 
for Separating Solid Bodies from Liquids.) 

An apparatus for separating suspended solids from ore pulps by 
passing the pulp in a thin sheet over bodies of water in a series of 
chambers, allowing various sized particles to settle while others float 
otT. Not truly a flotation patent. 

667,222, February 5, 1901. J. W. Ivery, Dillsburg, Pa. (For treat¬ 
ing Clay-like Material.) Assignor to E. Ellinger, Baltimore, Md. 

A process for purifying clay or like material, by mixing with the 
clay an oil, soap, grease or gelatinous ingredient adapted to cause its 


OIL-FLOTATION PROCESSES 


11 


suspension in water, while the grit and foreign matters are pre- 
- cipitated. The suspended clay is then floated off, precipitated by alum 
or some ingredient having the same effect, and the precipitate is dried. 

676,679. June 18, 1901. Francis E. Elmore, Leeds, Eng. (Process of 
Separating Metallic from Rocky Constituents of Ores.) 

The process of separating the metallic from other constituents of 
ore, which consists in mixing gently with crushed ore to which suf¬ 
ficient water has been added to make a flowing mixture, a substance 
other than mercury, such as a thick oil of low specific gravity, to which 
only the metallic particles will adhere, separating by flotation, and 
then recovering the metallic particles from such substance. A so- 
called bulk oil process. , 

678,860. July 23, 1901. Henry Peareth Hawdon Brumell, of Bucking¬ 
ham, Canada. (Apparatus for Separating or Concentrating Min¬ 
erals or Ores.) 

In an apparatus for separating or concentrating minerals or ores, 
a vessel adapted to contain a body of still water, a water-supply pipe 
projecting into said tank below the water-level, said pipe being pro¬ 
vided with a nozzle having a discharge directed toward a point of 
the end wall of the vessel intermediate between the water-level and 
the level of the nozzle, whereby a thin stream of water will be projected 
against said wall and deflected thereby across the surface of the body 
of water in the vessel to a discharge at the opposite end of the vessel, 
and a hopper adapted to deliver the dried material to be separated on 
to the surface of the stream of water. Minerals like graphite, molyb¬ 
denite, etc., will float on the surface film. 

679,473. July 30, 1901. John H. Davis, of Glens Falls, New York. 
(Graphite Separator.) Assignor to United States Graphite Com¬ 
pany, of same place. 

A water graphite-separator of trough-like construction, provided 
with means near the bottom of the trough for distributing the in¬ 
flowing wai.er to the machine; in combination with means for convey¬ 
ing the water and the graphite on the surface thereof in one direction 
and addition&l means for conveying the tailing in a different direc¬ 
tion by the action of gravity and a part of the water; together with ' 
a horizontally disposed perforated partition located above the tailing- 
conveying means. 

688,279. December 10, 1901. Alexander A. Allen, of Birmingham, 
Alabama. (Ore-Separator.) 

The combination with a vessel arranged to discharge by over¬ 
flow at one side, a broad inclined chute extending from said vessel to 
a point in said receptacle below the plane of discharge of the latter 
and arranged to receive the sheet discharged by said vessel and de¬ 
liver it substantially unbroken in said receptacle, and means for placing 
upon the moving sheet discharged from said vessel a thin layer of ma¬ 
terial to be separated. Especially adapted to graphite. 


l2 


ABSTRACTS OF PATENTS 


689,070. December 17, 1901. Alexander Stanley Elmore, of London, 
England. (Separating Mineral Substances by the Selective Ac¬ 
tion of Oil.) 

The process for separating metallic and rocky constituents of ore, 
which consists in mixing pulverized ore with water and gently mixing 
the ore and water with oil in the presence of an acid, allowing the mix¬ 
ture to rest, whereby the oil having the metallic substances entrapped 
in it floats at the top of the mixture, and separating the metallic con¬ 
stituents from the oil. Another bulk oil flotation patent in which the 
addition of an acid is all that is new. 

692,643. February 4, 1902. Alexander S. Elmore, London, England. 
(Apparatus for Separating Minerals by Selective Action of Oils.) 

The combination in an apparatus for separating metallic from 
rocky constituents of ore, of a trough, a shaft adopted to revolve 
within said trough, and provided with inclined blades, pipes for de¬ 
livering ore and water to said trough, a subsidence-tank arranged at 
one end of said trough extending below the same and communicating 
therewith, said tank adapted to receive the liquid mineral pulp and oil 
from said trough, a vertically-extending partition arranged in said 
tank at the top thereof for the purpose set forth, a centrifugal drum 
arranged at one side of said tank, a pipe connected to said tank and 
communicating with said drum for discharging therein the metallic 
ingredients and the oil, and a pipe connected to the tank for discharg¬ 
ing therefrom the earthy and rocky ingredients. 

696,739. April 1, 1902. J. Klein, Desloge, Mo. (Ore Classifier.) As¬ 
signor two-thirds to P. A. Fusz and C. D. McLure, of St. Louis, Mo. 

An ore classifier in the form of a cone shaped tank, with a top 
overflow around one-half of the periphery of the tank, and a horizon¬ 
tal discharge pipe near the apex of the cone. Two other pipes are con¬ 
nected to the classifier: one, a vertical air pipe at the apex of the 
cone; the other, an inlet pipe for water placed opposite to the dis¬ 
charge pipe. An agitating device, consisting of flanged arms at the 
end of a suitably operated vertical shaft, is provided. The light par¬ 
ticles in the ore pulp are carried up by the ascending air bubbles, the 
heavier particles on sinking are carried into the discharge pipe by the 
jet of water from the pipe at the bottom. 

703,905. July 1, 1902. Alexander S. Elmore, London, Eng. (Appar¬ 
atus for the Separation of Minerals by the Selective Action of 
Oils, etc.) 

An apparatus for affecting separation of minerals by the selective 
action of oils and like substances, the combination of a stepped incline 
for downflow of the mixed pulp and oil, with a traveling oiled apron 
arranged over and in suitable proximity to the said stepped incline for 
downflow of the mixed pulp and oil. This apron collects the oiled sul¬ 
phides which are later removed. 


OIL-FLOTATION PROCESSES 


13 


709,593. September 23, 1902. D. C. Boley, Chicago, Illinois. (Treat¬ 
ing Pulverized Ore.) Assignor to H. Block, Pekin, III. 

An apparatus for treating finely divided ore by Alteration, being 
a combination with a revolving filter surface, of means for creating a 
vacuum beneath the filter as it passes a portion of its course, and a 
means for producing, at a different time, an air pressure backward 
through the filter. 

725,609. April 19, 1903. John W. Wolf, Randolph, Iowa. (Aparatus 
for the Recovery of “Flour” Gold by Bulk Oil Flotation.) 

The crushed ore is saturated with kerosene, or other oil, and fed 
into a tank of brine thickened with clay or earth and covered with a 
layer of oil. The gold stays in the layer of oil, whose density is much 
less than that of a strong brine. 

727,974. May 12, 1903. J. Klein, Desloge, Mo. (Apparatus.) As¬ 
signor one-fourth to P. A. Fusz and C. D. McLure, of St. Louis, Mo. 

An improved ore classifier consisting of a receiving hopper for the 
ore, with air pipes, fitted with a rotary pulsating valve, and water 
pipes discharging into the hopper. The action of the air and water 
serve to agitate the mixture and cause the sludge and lighter par¬ 
ticles to be carried out through an overflow trough. The heavier ma¬ 
terial settles to the bottom of a ‘classified ore chamber, connected to 
the hopper, and passes from there to an amalgamating pot adapted 
to receive small particles of gold. 

729,805. June 2, 1903. J. & L. Stoveken, Cripple Creek, Colo. (Ap¬ 
paratus for Extracting Metal from Ores.) 

An apparatus designed for the treatment of low grade, clayey ores, 
whereby the ore is reduced to a finely divided state in the presence of a 
solvent. A series of tanks containing means for agitating the ore 
and solvent, and a filter adapted to separate the solution from the ore. 

734,641. July 28, 1903. Charles F. Wheelock, Birmingham, Alabama. 
(Ore Separator for Film Flotation of Graphite.) 

The combination of a vessel adapted to be filled with water and 
provided with means for precisely determining the level of the water, 
a chute declining toward and adapted to reach said level; a trans¬ 
verse waterpipe slightly below the water-level, approximately parallel 
with and in proximity to the discharge edge of the chute and discharg¬ 
ing laterally in the same general direction as the chute; means for de¬ 
livering water under pressure to said pipe; means for regulating said 
pressure; and means for causing a thin, uniform stream of dry graphite 
ore to descend the chute. 

735,071. August 4, 1903. Guillaume D. Delprat, Broker Hill, N. S. W., 
Australia. (Extraction of Zinc, Lead and Silver Sulphides from 
Their Ores.) 

The method of separating ores from gangue, which consists in 
forming a bath containing nitric acid, feeding finely ground ore thereto, 


u 


ABSTRACTS OF PATENTS 


whereby gas bubbles will be formed on the sulphide particles to raise 
them to the surface of the solution, and removing the particles of ore 
so lifted to the surface. Heat to be applied if necessary. No oil is 
used. 

736,381. August 18, 1903. Moritz Friederich Reinhold Glogner, Frie- 
burg, Germany. (Process of Purifying Graphite.) 

A process for purifying graphite in a wet and cold manner by 
the use of water and petroleum, consisting in the following operations: 
Purifying the graphite mineral from its heavy admixtures (as for 
instance quartz, iron and the like) by a washing with cold water; mix¬ 
ing said purified graphite mineral with about three or four times its 
weight of cold water; very strongly agitating said paste within a 
closed vessel after the addition of a quantity of petroleum of about 
half the weight of the pure graphite contained in the mixture; and 
then sprinkling water over the surface of the liquid, after the mixture 
has been allowed to stand, in order to obtain a quicker and more com¬ 
plete separation of the graphite particles from the earthy substances. 
Probably both bulk oil and froth flotation involved. 

737,593. August 25, 1903. Edmund L. Van der Naillen, San Francisco, 
Calif. (Apparatus for Extracting Gold and Other Metals from 
Ores.) 

An apparatus comprising a concentrating tank provided with an 
inlet and an outlet and a valve disposed transversely within the tank 
and operating when closed to separate the lower portion of the tank 
from the upper portion thereof. 

744,322. November 17, 1903. Arthur De Wint Foote, Grass Valley, 
Calif. (Process of Preparing Concentrating-surfaces.) 

The process of preparing a concentrating-surface, consisting in 
commingling petroleum and lime and spreading the same evenly over 
the surface of a concentrator. The metallic minerals stick in the in¬ 
soluble lime soap and are cleaned off periodically. 

745,960. December 1, 1903. Israel F. Good, Allentown, Pa. (Appar¬ 
atus for Separating Graphite or other Materials from Associated 
Impurities). Assignor of one-half to George Francis Pettinos, 
Bethlehem, Pa., and John Herbert Harris, Allentown, Pa. 

An apparatus comprising a rotary receiving-table, and pneumatic 
means for feeding the finer particles of graphite thereon where they 
float while the coarser portions escape, by sinking, but are later re¬ 
ceived by adding oil for bulk oil flotation. 

758,464. April 26, 1904. Homer L. Orr, Greeley, Colorado. (Mineral 
Separator.) 

In a mineral-separator the combination of a receiving-tank, a sep- 
arating-tank, a filtering-tank, a pipe or vessel connecting the filtering- 
tank and the receiving tank having therein a shaft provided with spiral 


(^IL-FLOTATION PROCESSES 


15 


blades, and means located in the receiving-tank and driven by the in¬ 
flowing water for operating said shaft to return the filtered liquid oil 
to the receiving tank to the separating-tank, where oiled minerals, such 
as flour gold, are buoyed up by an excess of oil and floated off. 

762,774. June 14, 1904. James W. Van Meter and Martin P. Ross, 
San Francisco, California. (Apparatus for the Concentration of 
Minerals by Means of Oil.) 

An apparatus for concentrating minerals by means of oil, com¬ 
prising a channel through which the oil flows, means for supplying 
pulp and water to the oil at the head of said channels, means in said 
channel at intervals for drawing off the settled gangue and water, 
means at the foot of said channel for separating the relatively upper 
and lower portions of the oil, and means for returning said separated 
upper portion of oil to head of the channel. 

762,870. June 21, 1904. H. A. Allen, Chicago, Ill. (Apparatus for 
Separating Materials of Different Specific Gravities.) 

An apparatus for separating materials of different specific grav¬ 
ities by the principle of the vortex whirl, in conjunction with a gaseous 
fluid and a liquid operating through a closed system, said gaseous 
fluid and liquid aiding to produce a separating action upon the mass 
to be treated. When the particles of different specific gravities are 
whirled around inside a suitably designed tank through which a liquid 
containing bubbles of gas is continuously pumped, the particles tend 
to separate into horizontal layers and may be drawn off through dis¬ 
charge openings placed at varying heights along the tank. 

763,259 and 763,260. June 21, 1904. Arthur E. Cattermole, Highgate, 
London, England. (Separation of the Metallic Constituents of 
Ores from Gangue.) 

A process of separating metalliferous matter from gangue, which 
consists in agitating a mixture of powdered ore and water with oil such 
as oleic acid, in emulsion in water containing an alkaline emulsifying 
agent, so as to agglomerate the oil-coated particles into granules, and 
subjecting the mixture to clasification to remove the small non-coated 
particles from the heavy granules of sulphides. Not a flotation pat¬ 
ent, but said by the Minerals Separation Company to have later re¬ 
sulted in froth flotation by reducing the amount of oil. 

763,662. June 28, 1904. Guillaume D. Delprat, Broken Hill, New South 
Wales, Australia. (Apparatus for Use in Certain Processes of 
Extracting Sulphides from Ores.) 

Assignor to Broken Hill Proprietary Company, Ltd., Melbourne, 
Victoria, Australia. In an ore concentrating apparatus in which the 
concentrates are floated to the top of a body of liquid, a pan having 
jg^IJned perforate bottom down which the ore slides, means to feed 
liquid to the pan, a sump at the lower edge of the bottom for tailings, 
a discharge for concentrates at the liquid level of the pan, a baffle- 


IG 


ABSTRACTS OF PATENTS 


plate between the sump and pan extending from the discharge to near 
the lower edge of the inclined bottom to maintain a quiescent body of 
liquid in the sump and at the same time maintain a flow of liquid from 
the pan through the discharge. This apparatus is to be used for Del- 
prat’s Process patent, 736,071. 

763,749. June 28, 1904. George A. Goyder and Edward Laughton, 
Adelaide, South Australia, Australia. (Process of Eflfecting the 
Separating of Minerals.) 

In a method of separating minerals and extracting some of them 
as concentrates, the steps of moving the ore in a flnely-divided state 
in a four per cent solution of sulphuric acid, which by the production 
of gas causes certain of the minerals contained in said ore to rise; and 
deflecting and guiding them as they rise. A temperature of 200 deg. 
F. is often preferable. * 

763,859. June 28, 1904. James D. Darling, Philadelphia, Pa. 

A process of separating carbon from pulverized carbonaceous ma¬ 
terial, like graphite, which consi.sts of mixing oil with said material; 
and flowing water through the mixture and through an obstruction or 
screen impervious to the commingled oil and carbon, but pervious to 
the water and gangue. 

766,289. August 2, 1904. Alfred Schwarz, New York, N. Y. (Process 
of Separation.) 

Assignor to Charles N. Lindley, individually and as trustee, New 
York, N. Y. A process of separating different materials by the 
selective action of two or more immiscible liquids of different specific 
gravities, which consists in introducing the materials in a granular 
or pulverulent condition, quietly, without downward impetus, and 
without agitation, into a bath of oil floating upon water. Bulk oil 
flotation. 

768,035. August 23, 1904. Guillaume D. Delprat, Broken Hill, New 
South Wales, Australia. (Extracting Zinc or Other Sulphides 
from Their Ores.) 

A method of separating ores from their gangue, which consists 
in forming a hot aqueous solution of an acid capable of reacting with 
the ore to form a gas and increasing the density of said solution by 
adding thereto a suitable substance, such as salt cake solution (acid 
sodium sulphate) of density 1.4, then feeding the mixture of ore 
and gangue to the solution, decreasing the density of the gas as it 
is formed on the ore particles, and removing the ore particles raised 
to the surface. Bubbles of carbon dioxide and hydrogen sulphide 
form, and the great density of the solution reduces the effective weight 
of the floated particles. 


OIL-FLOTATION PROCESSES 


17 


770,659. September 20, 1904. Joseph B. Scammell, London, England. 
(Separation of Metals from Their Ores.) 

The process consists in bringing finely-ground ore suspended in 
water into contact with chloride of sulphur diluted from 200 to 400 
times with oil matter, whereby the metallic particles combine with 
the sulpho-chlorinated oil. Bulk oil flotation is obtained, but such a 
sulpho-chlorinated oil possesses great cohesion and viscosity, making 
it more effective. Oxidized surfaces on the sulphides are said not 
to hinder flotation by this oil. 

771,075. September 27, 1904. Cosmo Kendall, Upper Norwood, Eng¬ 
land. (Separation of Mineral Substances by Means of the Selec¬ 
tive Action of Oil.) 

A process for the treatment of finely-divided material for the 
separation of graphitic substance contained therein from associated 
rocky matter or gangue, consisting in mixing said material with water, 
bringing said material intimately into contact or thoroughly mixing 
it with suitable pure thin oil, as kerosene oil or paraffin oil, project¬ 
ing at a considerable velocity the mixture so produced under the sur¬ 
face of a volume composed of said material, water and oil, allowing 
oil and graphitic substance adhering thereto to pass upward to said 
surface, and drawing off from said surface oil and graphitic sub¬ 
stance immediately on arrival at said surface. 

771,277. October 4, 1904. Alice H. Schwarz, New York, N. Y., as¬ 
signor to Schwarz Ore Treating Company. (Process of Concen¬ 
trating Ores.) 

A method of concentrating ores, which consists in mixing a melted 
fatty matter which is solid at normal temperature with the ore, then 
solidifying the fatty matter by introducing cold water and separating 
the gangue pulp from the values entrained in the fatty matter while 
the latter is solidified. 

771,874. October 11, 1904. W. R. Grant, Denver, Colo. Assignor to 
Colorado Iron Works Co., Denver, Colorado. 

A pneumatic hydraulic separator, fitted with an overflow launder 
at the top, and consisting of a cylindrical shell having a cone shaped 
extension riveted to its lower end. At the apex of the cone is a 
cast iron tip provided with two outlet openings. Compressed air is 
admitted at the lower part of the cylindrical shell through a pipe 
header. The fine ascending streams of air carry the lighter particles 
into the discharge launder, the heavier particles discharging through 
the bottom openings. 

776,145. November 29, 1904. Charles V. Potter, Balaclava, Victoria, 
Australia. (Process of Separating Metals from Sulphide Ores.) 

A process of separating metals from pulverized sulphide ores 
which consists in adding to the same an acid solution, such as a one 


IS 


ABSTRACTS OF PATENTS 


to ten per cent solution of sulphuric acid, which is a non-solvent of 
the'precious metals, then applying heat to the same, and removing the 
froth or scum of sulphides from the surface of the solution. 

777,159. December 13, 1904. Virginia Tunbridge, Newark, New Jer¬ 
sey. Administratrix of John Tunbridge, Deceased. (Apparatus 
for Recovering Precious Metals.) 

An apparatus for recovering slime gold or silver in which soap is 
added to the pulp which then drops through a layer of oil into a 
compartment filled with excelsior, on which the oiled metals are 
caught. 

777.273. December 13, 1904. Arthur E. Cattermole, London, England. 
(Separation of the Metallic Constituents of Ores from Gangue.) 

A process of separating metalliferous matter from gangue, which 
consists in mixing the pulp with an amount of any animal, vegetable 
or mineral oil or tar product, equaling only a fraction, say four to six 
per cent, of the metalliferous constituents, agitating the mass until 
the oil-coated metalliferous matter is agglomerated into granules, and 
subjecting the mixture to classification to remove the small non-coated 
particles from the heavy granules of sulphides. A small amount of 
soap to emulsify the oil is advisable. After thorough mixing, a gentle 
rolling action often assists in rolling up granules. This is the second 
commercially successful process using oils for concentrating ores. 

777.274. December 13, 1904. Arthur E. Cattermole, Henry L. Sulman 
and Hugh F. Kirkpatrick-Picard, London, England. (Concentra¬ 
tion of Minerals from Ores.) 

A process of concentrating ores which consists in mixing the ore 
pulp with soap solution and a mineral acid so as to liberate from the 
soap the organic acid which coats the desired mineral particles, but 
not the gangue, agitating the mixture so as to agglomerate the coated 
mineral particles into granules and separating the granules from the 
non-coated gangue. Commonly known as the “Soap and Granula¬ 
tion patent.” 

778,747. December 27, 1904. James H. Gillies, Melbourne, Victoria, 
Australia. (Apparatus for Separating Sulphides from Their 
Ores.) 

An apparatus for separating sulphides from ores by the hot 
acid gas bubble processes, comprising a treatment pan or vessel, 
means for heating the same, means for conveying a supply of cool 
or cold acid liquid to the bottom of said pan, and means for permitting 
said liquid to escape from the bottom of the pan to carry away the 
drossy matter without lowering the temperature or the level of the 
heated liquid in the upper part of said treatment pan or vessel. 


OIL-FLOTATION PROCESSES 


19 


780,281. January 17, 1905. James H. Gillies, Melbourne, Victoria, 
Australia. (Apparatus for Recovering Zinc or Other Sulphides 
from Their Ores.) 

In an apparatus for recovering zinc and other sulphides from 
their ores by the wet or acid chemical flotation process, and in combi¬ 
nation, a receptacle a series of radial over-lapping inclined V-shaped 
catchment-chutes so placed as to guide the rising metallic gaseously- 
supported particles and on their falling receive and automatically dis¬ 
charge the same, said catchment-chutes being so arranged that each 
slightly overlaps its neighbor on one side, a central escapement channel 
into which said particles fall, and means for removing said particles 
from said channel. 

784,999. March 14, 1905. George A. Goyder and Edward Laughton, 
Adelaide, South Australia, Australia. (Apparatus for Separating 
and Concentrating Minerals.) 

Apparatus for separating minerals and extracting some of them 
as concentrates, by hot acid flotation, consisting of a vessel adapted 
to contain a solution, the floor of such vessel being partly horizontal 
and partly inclined and provided with means for heating the solution, 
a feeding-hopper extending across one end of said vessel adapted to 
feed ore or minerals in a finely divided state, a series of transverse 
rod-rakes, and means for moving them at a regulated speed along 
the bottom of the vessel from the feed to the discharge end, inclined 
deflectors along and above the bottom of the separating portion of the 
vessel, trough-receptacles arranged parallel with the said deflectors 
and at such distance from the bottom of the vessel as to enable the 
gas-raised particles of mineral to be deflected, guided, deposited and 
collected therein, sloping extensions of said troughs and angular rakes 
for discharging the concentrates from the troughs through the sloping 
extension of the vessel. 

787,814. April 18, 1905. Jacob D. Wolf, London, England. (Separa¬ 
tion of Metals from Their Ores.) 

A process of separating metals from their ores which consists in 
agitating pulps with a thick viscous oil until the oil has taken up all 
the metallic-mineral contents with some gangue, separating the min¬ 
eral-bearing oil from the pulps, removing suspended particles of 
gangue from the oil by passing it through warm water and separating 
metallic minerals from the oil. Any oil entrained in the gangue is 
recovered by blowing air or steam through it, the oil collecting in a 
film on the surface. 

788,247. April 25, 1905. Arthur E. Cattermole, Henry L. Sulman and 
Hugh F. Kirkpatrick-Picard, London, England. (Ore Concentra¬ 
tion.) 

A process of concentrating ores which consists in mixing a freely 
flowing ore pulp with a soap solution and a mineral acid so as to 
liberate the organic-acid from the soap throughout the suspended ore 


20 


ABSTRACTS OF PATENTS 


mass in intimate contact therewith, whereby the organic acid coats 
the desired mineral particles and not the gangue, and thereafter 
separating the coated mineral matter from the non-coated gangue. 
This separation can take place by generation of gas bubbles in the 
pulp to float the oiled sulphides, or by attachment of oiled sawdust 
or use of an oiled vanner belt. Whether skin or froth flotation results 
is not mentioned. The process has come to be known as the ‘'Soap 
and Flotation” Process. 

790,913. May 30, 1905. Homer L. Orr and Fred B. Finley, Fort Col¬ 
lins, Colo. (Mineral Reclaimer and Saver.) 

A tank divided into a plurality of compartments of different 
sizes, a screen arranged in the larger compartment, a trough arranged 
below the screen, a plurality of compartments, each containing a fil¬ 
tering medium and means for supplying oil and water to the com¬ 
partments, and means for causing the liquids to traverse a tortuous 
path therethrough. This apparatus applies bulk oil flotation in saving 
flour gold. 

792,617. June 20, 1905. Benjamin Wm. Rice, Caldwell, Idaho. (Ap¬ 
paratus for Saving Precious Values in Soils.) 

An apparatus for saving metallic values from sand, gravel, etc., 
comprising a shaking-screen, a trough supported by arms secured to 
said screen, a screen-box, bars supported by said screen and positioned 
underneath the exit end of said trough, a tank adapted to contain 
water and oil and positioned underneath said screen box, sprocket- 
wheels mounted within and upon the upper edge of said tank, a 
sprocket-chain traveling about said wheels, cross pieces secured at 
intervals to the links of said chain and projecting laterally from the 
sides of the chain and adapted to travel adjacent to the bottom of 
the tank substantially its entire length, and a gate positioned within 
said tank and underneath which said cross-pieces upon the chain are 
adapted to travel. The apparatus allows bulk oil flotation of “flour” 
gold. 

793,808. July 4, 1905. Henry Livingstone Sulman and Hugh Fitzalis 

Kirkpatrick-Picard, London, England. (Ore Concentration.) 

A process of concentrating ores which has come to be known as 
the “Bubbles” process, and which consists in bringing the pulp into 
intimate contact with “oil” in the form of an atomized spray in a 
gas and thereafter separating the metalliferous constituents from the 
gangue, by flotation. One apparatus pictured is almost a reproduc¬ 
tion of the now well known Callow flotation machine, except that a 
rotating perforated coil of pipe is used on the bottom instead of a 
canvas bottom. The Minerals Separation Co., however, denies that 
this is a frothing process, although they own it. 


OIL-FLOTATION PROCESSES 


21 


795,823. August 1, 1905. James D. Darling, Philadelphia, Pa. (Means 
for Effecting Aqueous Separation.) 

An apparatus for effecting aqueous separation which consists of 
a receptacle; a water inlet and outlet to the same with means for 
regulating the flow of both; a foraminate partition interposed within 
the receptacle on the said apparatus toward which the water flows; an 
agitating apparatus within the receptacle on the side of the partition 
toward which the water enters; and propeller-blades in proximity to the 
partition by the rotation of which the material in the receptacle may be 
constantly driven away from the partition in opposition to the flow 
of the current. This apparatus is claimed to be adapted to the bulk 
oil flotation of graphite from its ores. 

805,382. November 21, 1905. Walter Murray Sanders, lola, Kansas. 
(Process for Concentrating Ores.) 

The method of concentrating ore, which consists in subjecting it 
to a non-acid solution, such as a solution of aluminum sulphate of 
1.2 sp. gr., capable of reacting with the ore or sulphide minerals, with 
evolution of gas, such as hydrogen sulphide, and collecting such 
particles as are sustained by the evolved gas. The solution is prefer¬ 
ably heated. 

807.501. December 19, 1905. Alfred Schwarz, New York, N. Y. 
(Process of Concentrating Ores.) Assignor to Schwarz Ore 
Treating Company, Phoenix, Arizona Territory, a corporation of 
Arizona Territory. 

The method of treating ores which consists in subjecting an 
oxidized ore to the action of a soluble sulfide such as sodium sulfide, 
to convert the mineral into a sulfide, then treating the mass with a 
hydro-carbon and finally separating by screening or by flotation, the 
hydro-carbon with the entrapped metallic constituents of the ore from 
the tailing. An excess of sulphur above the theoretical quantity 
necessary to sulphidize the oxidized mineral is used, although only a 
sulfide film is formed. 

807.502. December 19, 1905. Alfred Schwarz, New York, N. Y. 
(Process of Concentrating Ores.) Assignor to the Schwarz Ore 
Treating Company, Phoenix, Arizona Territory, a corporation 
of Arizona Territory. 

The method of concentrating ore which consists in mixing with 
the pulverized ore an agent to which the metallic constituents will 
adehere, consisting of a mixture of a normally non-liquid resinous 
hydro-carbon and a non-resinous hydro-carbon, then separating said 
adhesive agent with the entrapped values from the tailinp, and 
finally separating the values from said agent. Air may be injected 
to increase the sponginess of the masses of oil and entrapped sulphides. 


22 


ABSTRACTS OF PATENTS 


807.503. December 19, 1905. Alfred Schwarz, New York, N. Y. 
(Process of Concentrating Ores.) Assignor to the Schwarz Ore 
Treating Company, Phoenix, Arizona Territory, a corporation of 
Arizona Territory. 

The process of concentrating ores consisting of mixing with 
the pulverized ore a selective agent consisting of a mixture of a liquid 
hydrocarbon and a normally solid fatty matter, which mixture is solid 
at a normal temperature, separating said agent with its entrapped 
values from the tailings, and finally recovering the values from the 
selective agent. 

807.504. December 19, 1905. Alfred Schwarz, New York, N. Y. 
(Process of Concentrating Ores.) Assignor to Schwarz Ore 
Treating Company, Phoenix, Arizona Territory, a corporation of 
Arizona Territory. 

The process of concentrating ore consisting in melting a normally 
solid hydrocarbon mixing any pulverized ore therewith, separating 
said hydrocarbon with its entrapped values from the tailings by sub¬ 
jecting the mixture to the action of a bath of heated water while 
maintaining said hydrocarbon in a melted condition, and finally re¬ 
covering the values from the hydrocarbon. 

807.505. December 19, 1905. Alfred Schwarz of New York, N. Y. 
(Process of Concentrating Ores.) Assignor to Schwarz Ore 
Treating Company of Phoenix, Arizona Territory, a corporation 
of Arizona Territory. 

The process of concentrating ores consisting in mixing the ore out 
of contact with water with an adhesive agent composed of a hydro¬ 
carbon and sulphur, separating said agent with the entrapped values 
from the tailings, and recovering the values from the adhesive agent. 

807.506. December 19, 1905. Alfred Schwarz of New York, N. Y. 
(Process of Concentrating Ores.) Assignor to Schwarz Ore 
Treating Company of Phoenix, Arizona Territory, a corporation 
of Arizona Territory. 

The process of concentrating ores consisting in melting a normally 
solid resinous hydrocarbon, mixing the pulverized ore therewith and 
separating said hydrocarbon with its entrapped values from the tail¬ 
ings, and finally recovering the values from the resinous hydrocarbon. 

809,959. January 16, 1906. Edmund B. Kirby of Rossland, Canada, 
(Process of Separating Minerals.) 

The process of separating minerals, which consists in thoroughly 
mixing together the pulverized mineral material, a considerable quan¬ 
tity of water, and a solution of bitumen and kerosene, amounting to 
25-75 per cent of the weight of the ore; in gently agitating this mix¬ 
ture, and in blowing a gas into the same to assist in the flotation of 
the oil and the mineral particles which have been coated thereby; and 
in separating said oil and mineral particles. 


OIL-FLOTATION PROCESSES 


23 


816,303. March 27, 1906. John Henry Davis of Glens Falls, New York. 
(Graphite-Separator.) 

A graphite-separator, comprising a main trough, means for feed- 
graphite ore and water thereto, means for maintaining a water- 
level in the trough, and a series of partitions in the trough, each pro¬ 
vided with a separating-plate having its front end located just below 
said water-level; each of said plates being provided with means for 
carrying aw^ay fine sand and mud from a point near the surface of 
the water. Possibly film flotation is involved in this patent. 

822,515. June 5, 1906. Fred B. Finley of Los Angeles, California. 
(Ore-Separator.) 

In an ore-separator, the combination of a tank provided with an 
outlet-valve, a combined hopper and coil mixer arranged within the 
tank, a second tank into which the first tank discharges, a third tank 
into which the second tank discharges, a float-operated valve in the 
second tank for controlling passage of oil to the third tank, a valve 
in the first tank, a rock-beam, and a connection between the rock- 
beam and the float of the second tank and the valve of the first tank. 
Bulk oil flotation of metallic gold occurs. 

825,080. July 3, 1906. Alfred Schwarz of New York, N. Y. (Sepa¬ 
rator for Use in the Concentration of Ores.) Assignor to Schwarz 
Ore Treating Company of Phoenix, Arizona Territory, a corpora¬ 
tion of Arizona Territory. 

In a separator for use in the concentration of ores, by Schwarz 
earlier patents, the combination of a kettle adapted to contain water, 
shelves supported within said kettle, scrapers co-operating with said 
shelves to impart a continuous movement to the contents of the kettle, 
an over-flow discharge outlet at the top for the concentrates and 
adhesive agent, and a discharge-outlet at the bottom of the kettle 
for the tailing. 

825,909. July 17, 1906. Edmund B. Kirby of Rossland, B. C., Canada. 
(A method of recovering the oil from the bulk oil froth concen¬ 
trates of former patents, consisting in distilling it off with the 
aid of superheated steam.) 

A process for distilling off the oil from the concentrate obtained 
by an oil process of concentration. The oil coated particles are fed 
from a hopper into the inclined shaft of a report furnace, the tempera¬ 
ture of which is maintained at the distillation point of the oil used. 
The particles move slowly down the inclined shaft and are caught in 
suitable bins at the bottom. 

826,411. July 17, 1906. Francis Edward Elmore of London, Eng¬ 
land. (Process for Separating Finely-Divided Material.) 

A process of separating certain constituents of finely-divided 
material consisting in mixing the material with a liquid and a sub¬ 
stance that has a selective affinity for some of the constituents, sub- 


24 


ABSTRACTS OF PATENTS 


jecting the mixture to a pressure below that of the atmostphere, in 
order to form a froth by the bubbles of dissolved gases released by 
the vacuum, and collecting the particles floated. Elmore claims that 
this method requires much less oil or acid than former processes. 
This method of froth flotation is often called the “vacuum” method. 

835,120. November 6, 1906. Henry Livingstone Sulman, Hugh 
Fitzalis Kirkpatrick-Picard and John Ballot of London, England. 
(Ore Concentration.) 

The process of concentrating powdered ores which consists in 
separating the mineral from the gangue by coating the mineral with 
an oil, such as oleic acid, in water containing a small quantity of oil, 
less than one per cent, warming the mixture, agitating the mixture 
to form a permanent froth, and separating the froth. In the suit of 
Mineral Separation vs. Miami Copper Co., the former, who own this 
patent, claim that a new effect is obtained by using such a small 
amount of oil and that an “air froth” different from former “oil 
froths,” is obtained. This patent is claimed as their basic patent. 
In the suit of Minerals Separation vs. Hyde, which was decided in 
favor of Hyde, this patent was adjudged as showing nothing new, 
merely economy of oil. 

835,143. November 6, 1906. Henry Livingstone Sulman of London, 
England. (Ore Concentration.) 

A process for concentrating ores which consists in mixing the 
powdered ore with water, adding a small proportion of oily liquid 
having a preferential affinity for metalliferous matter, agitating the 
mixture, heating the mixture until gaseous bubbles are generated 
therein so that the oil-coated mineral matter forms into a froth and 
separating the froth from the remainder by flotation. Known as the 
“boiling” patent, from the manner of generating the bubbles of gas 
which form the froth. Even steam bubbles are involved. 

835,479. November 6, 1906. Henry Livingstone Sulman, Hugh 

Fitzalis Kirkpatrick-Picard and John Ballot of London, England. 
(Ore Concentration.) Assignors to Minerals Separation, Limited, 
of London, England. 

The process of separating powdered minerals from one another, 
which consists in suspending the powdered minerals in a liquid, sub¬ 
jecting the mixture to a gas pressure to dissolve an excess of gas in 
the water, and thereafter relieving the pressure whereby bubbles of 
gas are liberated in the pulp and carry certain minerals to the surface. 
This might be called the “pressure” patent. 

838,626. December 18, 1906. Edmund B. Kirby of Rossland, British 
Columbia, Canada. (Separating-Tank.) 

The combination of a separating-tank containing agitator mechan¬ 
ism, with means for discharging into the contained fluid charge a gas 
and a liquid lighter than water and immiscible therewith. Probably 
both bulk oil and froth flotation involved. 


OIL-FLOTATION PROCESSES 


25 


842,255. January 29, 1907. Alfred Schwarz of New York, N. Y. 
(Process of Concentrating Ores.) 'Assignor to Schwarz Ore 
Treating Co., of Phoenix, Arizona Territory, a corporation of 
Arizona Territory. 

The method of concentrating ores consisting in mixing with the 
pulverized ore resin-oil, then separating said agent with its entrapped 
values from the tailings and finally recovering the values from said 
agent. 

851.599. April 23, 1907. James Francis Latimer of Toronto, Ontoria, 
Canada. (Apparatus for Separating Minerals.) 

An apparatus comprising a vessel provided with a funnel-shaped 
bottom having a controlled discharge-opening at the apex thereof; an 
upwardly-sloping deflecting plate extending into said vessel; a screen 
of suitable mesh supported with said vessel at the top of the funnel- 
shaped bottom thereof—a rotatable pipe or conduit for introducing 
water into said vessel and having its discharge-end opening below 
said screen; horizontally-held paddles supported by said conduit at 
the required angle and designed to operate above said screen so as 
to create a centrifugal force so as to divide the graphite from the 
rocky matter or gangue and at the same time create an additional 
upward current in the water above said screen to that caused by the 
flow of water upward through said screen so as to cause the oil- 
provided graphite to rise to the top of the water so that it may be 
caught by said deflecting plate and so conducted out of said vessel. 

851.600. April 23, 1907. James Francis Latimer of Toronto, Ontario, 
Canada. (Process for Separating Minerals.) 

The process of separating graphite and similar substances from 
rocky matter and gangue, consisting in mingling the crushed ore with 
oil; delivering the oil-provided mass to; and maintaining it in an up- 
flowing current of water; centrifugally agitating the mass to separate 
the components and so accelerate the current as to carry the oil-pro¬ 
vided graphite to the top of the water; flowing the so separated 
graphite away; settling the gangue through an upflowing current of 
reduced speed below the zone in which the material is fed and agitated, 
and removing said gangue by a downwardly-flowing current. 

864,.597. August 27, 1907. Auguste Joseph Francois Debavay of Kew, 
Victoria, Australia. (Process of Separating Zinc-Blende by Flo¬ 
tation.) 

A process of separating zinc blende particles from ores, tailing 
and concentrates in a pulverized condition comprising the freeing of 
zinc blende particles from the carbonates and other impurities by 
first submitting the material to the action of a chemical re-agent, and 
then discharging the material in a film-like manner into a body of 
water by delivering the material in a thin pasty condition in the 
presence of a stream of water upon an inclined surface extending to 
said body of water, and then separating the film of zinc blende float- 


26 


ABSTRACTS OF PATENTS 


ing” on the water from the remaining ores, tailings or concentrates 
which precipitate in the body of water. 

864,856. September 3, 1907. Dudley H. Norris of New York, N. Y. 
(Method of Separating the Metallic and Rocky Constituents of 
Ores.) 

The method of separating the metallic and rocky particles of 
ore, which consists in introducing a stream of water containing 
air in solution into a mixture composed of crushed ore, oil and water 
to cause bubbles of air to form in said mixture and rise to the surface 
thereof to carry off the metallic particles of the ore. Air obtained 
in solution by pressure. Norris claims that oil can be omitted as the 
air bubbles do the selecting. 

865.194. September 3, 1907. Arthur P. Stanley Macquiston of Glas¬ 
gow, Scotland. (Process for Separating Solids.) 

A process for separating solids having different surface affini¬ 
ties for liquids, consisting in forming a pulp of the mixture, bringing 
the commingled particles through the surface of a gently flowing 
stream of liquid and returning the same to the stream in a direction 
transverse to the flow of the stream, and collecting concentrates 
thereby caused to float upon the stream in a film, one particle deep. 

865.195. September 3, 1907. Arthur P. Stanley Macquisten of Glas¬ 
gow, Scotland. (Apparatus for Separating Solid Particles from 
Each Other.) 

Means for separating a mixture of finely divided particles of 
ore, by the process of No. 865,194, comprising a cylinder arranged 
to rotate in contact with a body of liquid, said cylinder passing 
through the surface of the liquid in such direction as to carry the 
particles there through and to cause them to roll back to the surface 
of the liquid, said cylinder having a ribbed interior surface. 

865,260. September 3, 1907. Arthur Penrhyn Stanley Macquisten 
of Glasgow, Scotland. (Apparatus for Separating Solid Particles 
from Each Other.) 

Means for separating a mixture of finely-divided particles of ore, 
comprising a support for said particles arranged to move in contact 
with a body of liquid, said support passing through the surface of 
the liquid in such direction as to carry the particles there through 
and to cause them to roll back to the surface of the liquid. 

865,334. September 3, 1907. Alexander E. Elmore, London, England. 
(Apparatus for Concentrating Ores.) Assignor to the Ore Sepa¬ 
ration Company (1905) Limited, London, England. 

Apparatus for the treatment of ores with oil, comprising a mix¬ 
ing tank, a mixing device for intimately mixing a pulp of the ore 
with oil in the mixing tank, and a floating sea of oil inclosed by a ring 
for excluding the air from the said tank during the mixing process. 
Bulk oil flotation. 


OIL-FLOTATION PROCESSES 


27 


873,586. December 10, 1907. Dudley Hiram Norris of New York, 

N. Y. (Apparatus for Separating the Metallic Particles of Ores 

from the Rocky Constituents Thereof.) 

An apparatus for carrying out patent No. 864,856, comprising 
a receptacle having its upper end open to the atmosphere and adapted 
to receive a flowing mixture of pulverized ore and water, means for 
introducing a stream of water containing air in solution into the 
mixture in said receptacle to cause infinitesimally small nascent bub¬ 
bles of air to form in said mixture and rise to the surface thereof to 
collect the metallic particles of the ore together, a member arranged 
at the upper end of said receptacle to receive the metallic particles 
of the ore, and a discharge pipe at the lower end of the receptacle out 
of which the water and the rocky particles of the ore pass. 

879,985. February 25, 1908. Henry Livingstone Sulman, Hugh 

Fitzalis Kirkpatrick-Picard and John Ballot of London, England. 

(Separation of Metalliferous Minerals from Gangue.) 

The process of treating ores to separate metalliferous matter 
from gangue which consists in mixing the powdered mineral with 
water to form a freely flowing pulp, agitating the mineral pulp 
with a small quantity of oil, fatty or tarry substance, sufficient only 
to impart a thin coating of oil to the metalliferous particles, distribut¬ 
ing the mixture in' the form of a thin sheet of flowing liquid, causing 
the immersed particles to be exposed to the air and thereafter to meet 
the surface of the liquid, collecting the floating oiled metalliferous 
particles and collecting the gangue which sinks. This amounts to 
film flotation of oiled particles. Does not claim raising of oiled 
particles to the surface by the aid of gas bubbles. 

889,300. June 2, 1908. B. E. Duggan, Telluride, Colo. (Slime Saving 

Device.) 

A device for skimming the floating minerals from the surface of 
a concentrating table, comprising two converging deflecting arms 
arranged in the form of a Y, which conduct the floating minerals 
to a spout, which, in turn, discharges them into a suitable settling 
tank or box. 

899,149. September 22, 1908. Jacob D. Wolf of London, England. 

(Separation of Metals from Their Ores.) 

The combination with a traveling belt, of means for coating one 
face of same with a metal selective substance, means for roughening 
said coating, said roughened coating adapted to receive wet ore pulp, 
and means for relieving said belt of said selective substance and 
adhering metals. Not flotation but the selective adherance of oil 
to sulphides is utilized. 

899,478. September 22, 1908. Jacob David Wolf of London, England. 

(Process for Separating Metals from Their Ores.) 

A method of separating metals from their ores which consists 
in forming a pulp; passing said pulp containing the metals over an 


2S 


ABSTRACTS OF PATENTS 


oily adhesive substance; and in abrading the surface of said substance 
by drawing apart the body of the same, and thereby causing some 
of the mineral particles to adhere thereto. 

902,018. October 27, 1908. Henry Livingstone Sulman and Evan 
Aspray Sulman of London, England. (Ore-Concentrator.) As¬ 
signors to Minerals Seperation, Limited, of London, England. 

In an apparatus, resembling a buddle or round table for concen¬ 
trating ores, the combination of a fixed surface, means for feeding 
powdered ore over the surface, means for continuously feeding a thin 
stream of liquid over the surface, a movable body having a flexible 
squeegee edge in contact with the surface sufficiently flexible to pass 
over the ore while exerting sufficient pressure on the surface to re¬ 
move the film of water therefrom, means for sweeping the body over 
the surface in a direction at right angles to the direction of flow of 
the water to cause the ore to be alternately exposed to the air and 
to the edge of the liquid. Film flotation. 

911,077. February 2, 1909. Walter Murray Sanders of Marion, Ken¬ 
tucky. (Apparatus for Concentrating Ores.) 

Apparatus for applying patent 805,382, for concentrating ore by 
flotation, comprising a tank having means for introducing ore and 
solution below the normal liquid surface, a central discharge gate for 
tailings, a substantially central overflow for concentrate, and means 
for imparting a whirling motion to the liquid in the tank. 

912,783. February 16, 1909. Auguste Joseph Francois De Bavay of 
Kew, Victoria, Australia. (Apparatus for Separating Ores by 
Flotation.) 

An apparatus for applying De Bavay’s process, patent No. 864,597, 
with the combination of a feed pipe, a rotary worm therein, an ore 
supply connected to each terminal of said pipe, a water supply pipe 
arranged parallel and adjacent to said feed pipe, a plurality of in¬ 
clined chutes, distributing means extending transversely of each chute, 
a liquid containing receptacle at the lower end of each chute, provided 
at one side with an adjustable overflow lip and inclined gutter for 
receiving and conveying the particles capable of flotation, an endless 
traveling belt in each of said receptacles having one end submerged 
therein and adapted to convey the heavier constituents from one trough 
to the succeeding inclined chute, spray pipes adapted to deliver water 
upon the belts after they have emerged from said receptacles, and 
operating means common to said distributing means and said endless 
traveling belts. 

933,491. September 7, 1909. Marcus Ruthenburg of Lockport, New 
York. (Ore Separating Process.) 

A process of separating ore or concentrate particles of different 
specific gravity, which cannot be wetted in water, which consists in 
surrounding the same with a non-metallic liquid capable of wetting 


01 L-P"L0TATI0N PROCESSES 


21) 


the surfaces of said particles so that they are separated by gravity 
processes in said liquid. Slimes and finely divided mixtures of sul¬ 
phides can thus be tabled in a pulp made up of oil and ore; no flota¬ 
tion involved. 

933,717. September 7, 1909. Alfred A. Lockwood and Marcus R. A. 
Samuel, London, England. (Process of Treating Ores.) 

The process of treating ores, which consists in mixing an ore 
with a magnetic substance and an oily liquid adapted to cause the 
magnetic substance to adhere to some constituent part of the ore in 
preference to the others, and then magentically separating the mix¬ 
ture. This process is known as the Murex Process. 

937,325. October 19, 1909. H. L. Orr, Georgetown, Wash. (Ore 
Separator and Concentrator.) 

An improved ore concentrator comprising a primary tank in 
which an inclined moving belt, mounted on suitable pulleys, passes 
from a lower corner up and over the opposite end and discharges into 
a smaller tank. The framework on which the belt operates recipro¬ 
cates in the direction of the line of travel of the belt. An amalgamating 
plate is inclined downward toward the belt and extends upward to a 
point several inches below the surface of the water in the tank. Ore 
is fed into the tank directly above the plate and passes down through 
the water onto the plate which catches the amalgamable gold and 
directs the ore onto the moving belt, which carries the adhering 
mineral to the discharge tank. Any greasy or floating mineral, re¬ 
maining on the surface of the water, is directed by jets of air from a 
suitably arranged pipe to one corner of the primary tank, and escapes 
through an intermittently operated gate into a third tank. Here a 
paddle wheel raker pushes the float to the other end of the tank, 
where it remains until the valuable ingredients coagulate and settle 
to the bottom. 

938,732. November 2, 1909. Henry Azor Wentworth of Newton, Mas¬ 
sachusetts.. (Roasting Separation Process.) Assignor to Huff 
Electrostatic Separator Company of Boston, Massachusetts, a 
corporation of Maine. 

The process of separating zinc sulphide from other sulphides asso¬ 
ciated therewith which consists in superficially changing sulphides 
other than zinc sulphides by subjecting the mass to heat, and there¬ 
after separating by flotation, the heat-affected particles from those 
unaffected. 

942,663. December 7, 1909. S. Rachelman, St. Paul, Minn. (Appa¬ 
ratus.) Assignor to Northern Placer Machine Co., St. Paul, Minn. 

An apparatus for washing out and retaining placer gold, com¬ 
prising a revolving pan provided with magnetic plates for catching 
the magnetic sands and an upper lining of loose fuzzy material, 
heavily coated with beeswax or equivalent material, whose function 
it is to catch and hold the particles of fine gold. 


HO 


ABSTRACTS OF PATENTS 


949,002. February 15, 1910. A. S. Ramage, Newark, N. J. (Assignor 

to Chemical Development Co., Buffalo, N. Y.) 

A process for separating the valuable minerals from such ores 
as chalcopyrite, bornite, or erubescite, and mixtures of the same with 
pyrites, zinc blende, or ores containing cobalt and other sulpharsendies 
by a combination of fractional roasting followed by chemical floating, 
e. g. an ore of chalcopyrite and pyrite is first roasted to decompose 
the iron sulphide, leaving the copper sulphide unchanged. It is then 
floated in a hot solution of acid sulphate of soda and free nitric acid, 
when the chalcopyrite rises to the top of the bath and can be skimmed 
off. 


952,222. March 15, 1910. R. S. Towne, New York, N. Y. (Appara¬ 
tus.) 

An apparatus for agitating liquid material in which agitation 
can be carried on during the operation of filling and emptying the 
tank, comprising a tank with either an interior or exterior pipe or 
column opening at top and bottom into said tank, and provided at the 
bottom with an air jet. A number of pipes or openings, at various 
heights along the column, provide for the continuous circulation of 
the liquid from the column to the tank irrespective of the depth of 
the liquid in the tank. 

953,746. April 5, 1910. Theodore Jesse Hoover of London, England. 
(Apparatus for Ore Concentration.) Assignor to Minerals Sepa¬ 
ration Limited of London, England. 

In an apparatus for concentrating ores by gaseous flotation of 
certain mineral particles in liquid, the combination of, an agitation 
vessel, a spitzkasten contiguous thereto, said vessel and spitzkasten 
adapted to contain circuit liquid, means for agitating the contents of 
the agitation vessel so as to beat air into the liquid, and a wall be¬ 
tween the agitation vessel and the spitzkasten having a wide com¬ 
munication orifice below the level of the liquid in both* vessels, said 
agitation vessel adapted to discharge substantially directly into the 
spitzkasten. This is an early form of the present standard Minerals 
Separation machine. 

955,012. April 12, 1910. Henry Livingstone Sulman of London, Eng¬ 
land. Assignor to Minerals Separation, Limited, of London, Eng¬ 
land. (Concentration of Ores.) 

A process of concentrating ores which consists in mixing the 
powdered ore with slightly acidified water containing in solution a 
minute quantity of an alcohol, such as .002 to .01 per cent amyl alco¬ 
hol, agitating the mixture, bringing the ore particles into contact 
with air so as to cause the metallic sulfides to float in a coherent froth 
and separating the floating particles. 


01 L-FLOTATION PROCESSES 


31 


956,381. April 26, 1910. Alfred A. Lockwood and Marcus R. A. 
Samuel, London, England. (Process of Treating Ores.) As¬ 
signors to the Murex Syndicate, Limited, London, England. 

A process of treating sulfid ores which consists in crushing 
ores composed of friable sulfids in which the commingled grains or 
particles are bound together by a sulfide, agitating such crushed ores 
with an alkaline silicate solution to weaken the bonds between the 
grains of the commingled sulfides on cleavage lines so that they may 
be advantageously separated without excessive grinding and con¬ 
comitant sliming and then subjecting said particles to separation and 
separate collection. Not a flotation process. 

956,773. May 3, 1910. Alfred A. Lockwood of London, England. 
(Process of Treating Ores and Carboniferous Earths.) 

In a process for treating ores, agitating the ore with a mixture 
comprising water, an insoluble metallic compound containing oxygen 
and an oily liquid which has been so treated that it contains a minute 
quantity of metallic compound insoluble in water, such as an aluminum 
soap, for the purpose of preventing the washing out of said insoluble 
metallic compound, and then separating the oiled particles from the 
unoiled particles by a flotation process. 

956,800. May 3, 1910. James Dunstone, of Dollar Bay, Mich. (Pro¬ 
cess for Treating Metallic Slimes.) 

The process consisting in agitating metallic copper slimes in the 
presence of an emulsion of oil, an aqueous solution of sodium nitrate, 
and an acid adapted to decompose the sodium nitrate, and collecting 
the portion floated. 

962,678. June 28, 1910. Henry Livingstone Sulman, Henry Howard 
Greenway and Arthur Howard Higgins of London, England. (Ore 
Concentration.) 

A process of concentrating ores which consists in mixing the 
powdered ore with acid water containing in solution a small quantity 
of a mineral-frothing agent, such as phenol, cresol, amyl acetate, etc., 
agitating the mixture to form a froth and separating the froth. This 
is the first mention of soluble frothing agents, although some of the 
tars previously mentioned contain soluble constituents. This patent 
belongs to the Minerals Separation Company. 

967,671. August 16, 1910. Alexander S. Ramage of Detroit, Michigan. 
(Method of Separating Minerals.) Assignor to Chemical Devel¬ 
opment Co., of Buffalo, N. Y., a corporation of Colorado. 

The method of treating ores containing a plurality of mineral 
components, which consists in immersing the ore in a suitable solution, 
separately floating said mineral components by progressively raising 
the temperature of the solution, and removing at each rise of tem¬ 
perature the product separated during such rise. This is one of the 
first patents claiming a true differential flotation. 


32 ABSTRACTS OF PATENTS 

968,206. August 23, 1910. L. Strom, Los Angeles, California. (Art 
of separating liquids and apparatus therefor.) 

An apparatus for separating oil from water by a mechanical de¬ 
vice making use of centrifugal force. 

970,002. September 13, 1910. Henry Azor Wentworth of Lynn, Mas¬ 
sachusetts. (Process of Separation.) Assignor to Huff Electro¬ 
static Separator Company of Boston, Massachusetts, a corpora¬ 
tion of Maine. 

' A differential flotation process which consists in associating with 
the material a substance chemically reactive upon particles thereof, 
thereby producing upon the particles affected by the reactive substance 
superficial coatings of a compound different from the original sub¬ 
stance of the particles in respect to film-tension of a liquid, and there¬ 
upon separating the differentiated particles by film-tension of said 
liquid. 

972,459. October 11, 1910. F. S. MacGregor, Hyde Park, Mass. (Ap¬ 
paratus.) Assignor to Huff Electrostatic Separator Co., Boston, 
Mass. 

An apparatus for separating the various minerals from ores which 
have been treated by the process invented by Wentworth (U. S. 
patent 938,732. q. v.) comprising a tank divided into several com¬ 
partments, the partitions between which are progressively lower in 
height when passing toward the discharge end of said tank, thus 
causing a flow when the liquid is drawn off from the last compart¬ 
ment and pumped back to the first compartment. Aprons or short 
flumes, studded with pins, extend nearly the whole length of each 
compartment, the function of which being to cause a thorough mixing 
of the particles and liquid before passing into a compartment. In 
operation the treated ore is gently presented to the surface of the 
liquid at the head of the tank, and on passing the several compart¬ 
ments, the particles offering various degrees of resistance to being 
wetted, are progressively wetted, which causes them to sink when they 
can be drawn off from the bottoms of the various compartments. 

973,467. October 25, 1910. Samuel K. Behrend, of Denver, Colo. (Ap¬ 
paratus for Separating Minerals from Their Ores.) 

The combination with a separating tank adapted to contain 
liquid, and a pipe which discharges radially at the center of the tank 
and at the surface of the liquid therein, of a barrier located between 
the water inlet and overflow, said barrier having members in the 
path of the film of material floating thereon, and a screen located 
above the tank between said means and the water outlet, for sifting 
the material to be treated upon the surface of the liquid in the tank. 

979,820. December 27, 1910. S. K. Behrend, New York, N. Y. 

A flotation tank for ore dressing, comprising a number of in¬ 
verted pyramidal shaped cells connected in series, the partitions be¬ 
tween the cells being capped with wide flat plates placed just slightly 


01 L-FLOTATION PROCESSES 


33 


below the surface of the water flowing through the tank. In opera¬ 
tion the finely divided ore is fed onto the surface of the water, and, on 
passing over the plates, the thin film of water is slightly agitated, 
causing some of the particles to settle and be deposited in the fol¬ 
lowing cell or compartment. As many cells may be used as the con¬ 
ditions of the ore require. 

979,857. December 27, 1910. Theodore Jesse Hoover, London, Eng¬ 
land. (Apparatus for Ore Concentration.) Assignor to the Min¬ 
erals Separation, Limited, London, England. 

Apparatus for concentrating ores by gaseous flotation of certain 
mineral particles in liquid comprising in combination a mixing vessel, 
an agitator in the mixing vessel, a spitzkasten at the outlet of the mix¬ 
ing vessel, a secondary mixing vessel, a centrifugally acting agitator 
in said secondary mixing vessel and a connecting conduit between the 
tailings outlet of the spitzkasten and the zone of the suction influ¬ 
ence of the centrifugally acting agitator of said secondary mixing 
vessel. The multiplication of agitating compartments and spitzkastens 
in series resulted in the modern Minerals Separation flotation machine. 

980,035. December 27, 1910. H. A. Wentworth, Newton, Massachu¬ 
setts. (A Process of Separation.) Assignor to Huff Electro¬ 
static Separator Co., Boston, Massachusetts. 

Whereby a mass of mixed ore particles is treated by a chemical 
re-agent which produces on some of the particles a superficial coating, 
more susceptible of wetting by, or, having a greater avidity for, a 
liquid, than the original particle. Thus ore not ordinarily amenable 
to flotation, can be so treated and a satisfactory separation made. 
The re-agent employed is a halogen, preferably chlorin. It acts most 
effectively on particles of pyrite, causing them to be easily wetted. 

980,143. December 27, 1910. Z. Cartwright of Ilford, England. 
(Method of Obtaining Solution of Certain Metallic Oxides.) 

A process for separating certain metallic oxides, mainly of iron, 
by placing them in an aqueous solution having not less than one-half 
of one per cent of saponaceous material. By increasing this percentage 
slowly the oxides may be collected together to any desired degree of 
concentration. They may then be precipitated by the addition of an 
alkali. 

984,633. February 21, 1911. H. E. Wood, Denver, Colo. (Process 
and Apparatus for Concentrating Ores.) 

A process for concentrating metalliferous ores which consists in 
feeding the dry ore in a finely divided state upon the surface of a 
body of water, and recovering the valuable minerals which remain sup¬ 
ported on the surface film of water. The apparatus comprises an 
inclined plate over which water is caused to flow in a thin sheet, a 
device for feeding the dry ore in a uniform stream upon the sheet of 
water, and a tank arranged for the splitting off of the surface film of 
water with the particles supported thereon. 


34 


ABSTRACTS OF PATENTS 


987,209. March 21, 1911. H. E. Wood, Denver, Colorado. (An Ore 

Concentrator.) 

An apparatus for concentrating ore by film flotation, comprising- 
and inverted conical tank, provided with an inlet for water so ar¬ 
ranged as to give a tangential direction to the inflowing water and 
causing a gyratory current to be set up on the surface of the water 
in the tank. An outlet or discharge pipe is provided at the apex of 
the tank. The floating minerals are collected by a suitably curved 
screen, dipping into the water, and directing them to a small inner 
conical tank which, in turn, discharges into a pipe passing out through 
the side of the main tank. 

988,737. April 4, 1911. Walter Murray Sanders, Marion, Kentucky. 

(Process of Concentrating Ores.) 

The process of concentrating sulfid ores, which consists in first 
concentrating the ore to effect a substantially complete separation of 
calcite, and thereafter subjecting the purified ore to further concen¬ 
tration by flotation in a solution adapted to react upon the ore to 
produce bubbles and capable of reacting upon calcite. The advantage 
claimed is removal of calcite which uses up the acid often used in 
flotation. 

994,950. June 13, 1911. F. I. DuPont, Wilmington, Delaware. 

(Process.) 

A process for the separation of solids from each other by the 
use of liquids, the separating liquid being insoluble in and more 
volatile than the other liquid used. In the example given, pure coal 
is separated from accompanying slate and shale by passing the ma¬ 
terial into a tank containing carbon tetrachloride. The coal floats 
and is removed by a conveyor, the slate and shale sink and are re* 
moved by a second conveyor. Both products are delivered to tanks 
containing water, heated by steam pipes. The carbon tetrachloride 
being insoluble in water and more volatile, is driven off and con¬ 
densed for further use. 

996,491. June 27, 1911. Alfred Arthur Lockwood, London, England. 

(Magnetic Preparation of Ores.) Assignor to Murex Magnetic 

Company, Limited, London, England. 

In the magnetic preparation of an ore, the process which consists 
in treating the ore with a finely ground magnetic substance, an oily 
liquid, and a solution of a sulfid of an alkali metal and magnetically 
separating the mixture. The magnetic substance and oil coat the 
sulphides. This is not a flotation patent. 

1,002,865. September 12, 1911. F. 1. DuPont, Wilmington, Delaware. 

A process for the gravity separation of certain iron ores from 
gangue. Limonite ores are first heated to drive off the contained 
water. The treated ore is then delivered to a tank containing a solu¬ 
tion of antimony bromide at a temperature of 100 degrees C. The 


01 L-FLOTATION PROCESSES 


as 

silica and gangue float on the surface, while the purified iron oxide 
sinks. 

1,004,815. October 3, 1911. F. I. DuPont, Wilmington, Delaware. 

In processes of separating solids in heavy solutions, the liquid 
carried away by the solids is recovered by volatilization and condens¬ 
ing. Certain liquids are more or less decomposed by volatilization and 
leave a residue in the ore. This can be remedied by adding’ a haloid 
of ammonia, such as ammonium chloride, to the liquid, which prevents 
the formation of any residue during volatilization. 

1,014,624. January 9, 1912. Francis I. du Pont of Wilmington, Dela¬ 
ware. (Liquid Ore Separation.) 

The process of separating solids of different specific gravities, 
consisting in using a liquid whose specific gravity is intermediate 
between that of the valuable mineral and that of the gangue, like 
anhydrous antimony bromid, passing the mixture to be separated 
there through and separately discharging the portions which float 
and those which sink. 

1,014,977. January 16, 1912. Benjamin Sedgely Smith, of Manly, 
near Sydney, New South Wales, Australia. (Apparatus for the 
Wet Dressing of Sulfid Ores.) 

An apparatus for concentrating and classifying sulfid ores, the 
combination of conducting means for a film of water, means for dis¬ 
tributing ores on the surface of the film of water, an inclined table 
provided with an aperture therein, a valve controlled receptacle 
open to and in water tight engagement with the said aperture in said 
table, and a drowning box interposed between said conducting means 
and said table to conduct the ore carrying film of water from the 
former to the latter, to thoroughly submerge the ore therein whereby 
it sinks into said receptacle upon reaching the same. 

1,020,353. March 12, 1912. Edward James Horwood of Broken Hill, 
New South Wales, Australia. (Process of Treating and Sub¬ 
sequently Separating Sulfid Ores, etc.) 

The process of separating zinc sulfid from other sulfids asso¬ 
ciated therewith which consists in superficially changing sulfids other 
than zinc sulfids by subjecting the mass to a slight roast, and there¬ 
after separating by flotation, the heat-affected particles from those 
unaffected. 

1,022,085. April 2, 1912. James M. Hyde, of Basin, Montana. (Art 
of Concentration of Mineral Substances.) 

A continuous process of concentrating the valuable constituents 
from ore pulps, comprising the addition to the pulp of an acid precipi¬ 
tant adapted to react upon the ore or coagulate the fine slimes, allow¬ 
ing a time interval to elapse prior to subjecting it to the flotation 


3G 


ABSTRACTS OF PATENTS 


treatment, then subjecting the pulp to a separation treatment com¬ 
prising the steps of adding a non-metallic material, such as a flota¬ 
tion oil, which will preferentially coat the valuable particles of the 
ore and separating said coated particles as a concentrate. 

1,032,732. July 16, 1912. William Sullivan Blaine, of Torreon, 
Mexico. (Apparatus for Separating Particles of Rubber from Ma¬ 
terials with which they are Commingled.) Assignor to Inter¬ 
continental Rubber Company, of New York, N. Y., a corporation 
of New Jersey. 

Apparatus for separating particles of rubber from materials 
with which they are commingled, said apparatus comprising a flota¬ 
tion tank, a concentrating table communicating with said tank at 
one end thereof, and an overflow for floating rubber from the flota¬ 
tion tank, so arranged as to maintain a shallow covering of water 
upon the concentration table. 

1,032,733. July 16, 1912. William Sullivan Blaine, of Torreon, 
Mexico. (Method of Separating Particles of Rubber from Ma¬ 
terials with which they are Commingled.) Assignor to Intercon¬ 
tinental Rubber Company, of New York, N. Y., a corporation of 
New Jersey. 

The method of separating particles of rubber from materials with 
which they are commingled, which consists in separating the rubber 
particles by flotation in a body of water, and withdrawing the heavier 
residues or sinkers into an auxiliary substantially quiescent body of 
water and under such back pressure as will substantially prevent re¬ 
entrance into the sinkers, of rubber particles that have been released, 
and floated. 

1,043,850. November 12, 1912. Alfred Arthur Lockwood, of London, 
England. (Process of Separating Ores.) Assignor to Murex 
Magnetic Company, Limited, of London, England. 

A process which consists in treating the ore with an oily liquid, 
water and with a silicate of an alkali metal to modify the behavior of 
the oil toward the constituents in the ore and separating the oiled 
constituents from the unoiled constituents. This process in which 
flotation can be used is interesting in showing a method for oiling 
one sulphide while another remains unoiled. 

1,043,851. November 12, 1912. Alfred Arthur Lockwood. (Process 
of Separating Ores.) Assignor to Murex Magnetic Company, 
Limited, of London, England. 

A process which consists in treating an oxidized ore with an 
oily liquid and water; aiding the oiling of the oxidized metalliferous 
contents of the ore by treatment with a carbonate of an alkaline 
metal and separating the oiled constituents from the unoiled constitu¬ 
ents, by either Murex magnetic separation or by flotation. 


01 L-FU)TATI0N PROCESSES 




1,045,970. December 3, 1912. Thomas John Greenway, of Armadale, 
near Melbourne, Victoria, Australia. (Separation of Metallic 
Sulfids from Sulfid Ores.) Assignor to Potter’s Sulphide Ore 
Treatment, Limited, of Melbourne, Australia, a corporation of 
Victoria, Australia. 

A process for the improvement of the hot acid flotation separa¬ 
tion of metallic sulfids from sulfid ores which consists of first inti¬ 
mately mixing finely divided particles of the ore with a small pro¬ 
portion of viscous oil; secondly, feeding the oiled ore into a heated 
acidulated solution; thirdly, skimming or fioating off the coherent 
buoyant scum of gasified oiled sulfid particles, and separately with¬ 
drawing the unoiled sunken gangue particles. Increased coherence 
of the scum of floated material is claimed. 

1,052,061. February 4, 1913. Robert Henry Jeffrey, of Gabriel, 
Mexico. (Ore Float-Separator.) 

An ore-float separator containing a body of liquid, means giving 
the effective surface of the liquid conical form, a centrally disposed 
liquid supply delivering the liquid radially outward in all directions, 
an ore distributer above the liquid and adjustable to and from the 
liquid surface, and means for imparting rotary motion to the ore 
distributor. A film flotation is obtained. 

1,055,495. March 11, 1913. Carl Schick, of Siegen, Germany. (Process 
for Treating Ores.) 

A process of treating ore slimes which consists in mixing the 
slimes with a small fraction of a pound per ton of ore of a chlorin 
derivative of benzol, agitating the mixture, subjecting the mixture to 
an acid bath, and permitting the settlement of the mixture. The 
sulphide float and the gangue sinks. 

1,056,952. March 25, 1913. Alexander Herbert Smith, of Glasgow, 
Scotland. (Apparatus for Separating Minerals.) 

A device for preventing water and gangue flowing into the con¬ 
centrates launder of a flotation machine. The combination of a spitz- 
kasten having an open top, a concentrate lip and a straight side wall 
having a slot lower than said lip and remote from the bottom of the 
spitzkasten; a pocket surrounding said slot and provided with a lip 
higher than said slot and lower than the concentrate lip; and means 
for conducting mineral feed into the spitzkasten. 

1,058,111. April 8, 1913. Alexander H. Smith, of Glasgow, Scotland. 
(Ore Mixing and Separating Apparatus.) 

A flotation apparatus comprising a mixing chamber and a spitz¬ 
kasten. The mixing chamber is beneath the level of the spitkasten. 
Mixing is accomplished by two impellers on the same horizontal shaft 
coming in through stuffing boxes in the sides of the mixing 

chamber. 


38 


ABSTRACTS OF PATENTS 


1,064,209. June 10, 1913. James Hebbard, of Broken Hill, New 
South Wales, Australia. (Apparatus for Ore Concentration.) 
Assignor to Minerals Separation, Limited, of London, England. 

Apparatus for concentrating ores by gaseous flotation of certain 
mineral particles in liquid, comprising in combination of a series of 
adjacent mixing vessels, each containing a rotary agitator and a 
spitzkasten placed contiguous thereto having a high level orifice 
leading from the first mixing vessel to the spitzkasten, and a low 
level orifice leading from the spitzkasten to the bottom of the second 
mixing vessel. Commonly called the single-level valveless machine 
of the Minerals Separation Company. 

1,064,459. June 10, 1913. Francis 1. du Pont, of Wilmington, Dela¬ 
ware. (Method of Gravity Liquid Separation of Solids.) 

A process of gravity liquid separation of solids, which consists 
in immersing the solids to be separated in a liquid of greater specific 
gravity than water, separately removing from the bath the separated 
constituents of different specific gravity, volatilizing the gravity 
liquid carried off by each constituent, condensing the same and re¬ 
turning the same to the separating bath and maintaining the circuit 
of the liquid carried off from the bath by the constituents from its 
departure from the bath until return to the bath out of connection 
with the air. 

1,064,723. June 17, 1913. Henry Howard Greenway, of Melbourne, 
Victoria, and Henry Lavers, of Broken Hill, New South Wales, 
Australia. Assignors to Minerals Separation Limited, of London, 
England. 

A process of concentrating ores, which consists in mixing finely 
divided ore with water containing as a froth-producer, an essential 
oil, such as eucalyptus, cinnamon, penny-royal, etc., agitating to insure 
thorough aeration and separating the froth from the gangue in a 
spitzkasten attached to the agitating compartments. The Minerals 
Separation Company claims that this patent reveals methods which 
allow the elimination of acid and lieat in flotation. 

1,067,410. July 15, 1913. Francis 1. du Pont, of Wilmington, Dela¬ 
ware. (Apparatus for Gravity Lnquid Separation of Solids.) 

/ 

An apparatus for gravity liquid separation of solids, as described 
in patent No. 1,064,459, comprising a revolving cylinder adapted to 
contain the separating liquid, conical ends projecting from said cylin¬ 
der, an inner peripheral continuous spiral blade in said cylinder, 
adapted to convey the material that sinks to one end of the cylinder 
where it is discharged, while the floating material passes to the other 
end of the cylinder. The adhering liquid is distilled off from the 
solids and reused. 


01 L-FLOTATION PROCESSES 


30 


1,067,485. July 15, 1913. Howard Holt Nutter, of Berkeley, Califor¬ 
nia, and Henry Lavers, of Broken Hill, New South Wales, Aus¬ 
tralia. Assignors to Minerals Separation Limited, of London, 
England. 

A process for concentrating ores by which the ore pulp is sub¬ 
jected to repeated treatments by flotation under different conditions— 
varying the amounts of oil and acid used—the products thus obtained 
contain different minerals in such a limited range of sizes that they 
may be further treated on concentrating tables. 

1,069,169. August 5, 1913. H. Parker, Nashura, New Hampshire. 
(Separating Apparatus.) Assignor to Improved Paper Machinery 
Company, Nashura, New Hampshire. 

An apparatus for separating and catching the solid material con¬ 
tained in the waste water from paper making machines. The waste 
water passes from a supply tank into a second tank, fitted with baf¬ 
fles. If the baffles are used as electrodes and are connected to a 
battery, the bubbles of hydrogen gas generated attach themselves to 
the solid particles, thus causing them to rise to the surface in a third 
or separating tank, where they are skimmed off. Instead of using an 
electric current for generating gas, the gas may be generated from 
some outside sources, and is then introduced into the tank. 

1,071,784. September 2, 1913. E. H. Nutter, of New York, N. Y. 
Assignor to Minerals Separation, Limited, London, England. 

A valve for controlling the flow of thick pulpy material aj^d the 
like, comprising a rubber diaphragm, held against the bottom of the 
discharge pipe from a tank, by predetermined water pressure. When 
the accumulation of solids in the tank has reached a certain point, 
their weight is sufficient to press down the diaphragm, and the solids 
escape until the water pressure closes the valve. 

1,071,850.% --September 2, 1913. Henry E. Wood, Denver, Colorado. 
(Ore Concentrator.) 

A combination Wilfley table and flotation,machine, feeding dry 
ore and collecting floating concentrates by a special device, as well as 
the regular heavy concentrate of the particles which are too heavy to 
float. 

1,079,107. November 18, 1913. George Albert Chapman and Stanley. 
Tucker, of London, England. Assignors to Minerals Separation 
Limited, of London, England. 

A process for the flotation of ores in which the sulphuric acid 
commonly used is replaced by a bisulphate of an alkali metal or a 
combination of a normal sulphate with sulphuric acid, whereby the 
consumption of sulphuric acid is greatly reduced. 


40 


ABSTRACTS OF PATENTS 


1,080,886. December 9, 1913. Hermann Alexander Brackelsberg, cf 
Hagen, Germany. 

A surface tension separator for the flotation treatment of min¬ 
erals, comprising a number of concentric and conical shaped recep¬ 
tacles adapted to overflow into one another, the overflow walls being 
at progressively lower levels, and each overhanging the surface of 
liquid in the next receptacle at an angle adapted to cause a film of 
liquid to flow along the overhanging surface of said wall, and means 
for gently feeding the material and liquid across the series of recep¬ 
tacles. The valuable particles overflow into a suitable receptacle, 
while the gangue sinks to the bottom. 

1,081,360. December 16, 1913. Charles Henry Brown, Magdelena, New 
Mexico. Assignor to the Sherwin-Williams Company, Cleveland, 
Ohio, a corporation of Ohio. 

An apparatus for separating valuable minerals from gangue which 
is dependent upon the phenomenon of surface tension. The ore is fed 
upon a conveyor belt which is so arranged as to alternately dip into 
and out of water contained in a tank. This repeated presenting of 
the ore to the surface of the water causes the valuable particles to be 
floated off the belt, the gangue remaining being discharged at the 
end of the conveyor. Steam pipes are provided for heating the water, 
as increasing the temperature facilitates the separation. 

1,081,949. December 23, 1913. F. I. du Pont, Wilmington, Delaware. 
(Recovering Separating Liquids from Separated Solids.) Assignor 
to International Haloid Company. 

A process for recovering the heavy liquid carried away by the 
solids, when using this method of separation. The tin or antimony 
bromide carried away may be dissolved from the solids by alcohol, 
and later recovered by distillation; the alcohol distilling off at a tem¬ 
perature below the volatilization point of the bromides. 

1,084,196.. January 13, 1914. Walter Broadbridge and Allen Crawford 
Howard, London, England. (Apparatus for Ore Concentration.) 
Assignors to Minerals Separation Limited, London, England. 

Apparatus for carrying out the agitation-froth process of ore 
concentration comprising in combination a series of agitating and 
aerating vessels, a series of spitzkastens contiguous thereto and com¬ 
municating with a plurality of the said vessels at various points, and 
partitions between the spitzkastens which do not extend up to the 
liquid level, so as to leave uninterrupted surface for the formation 
of the froth. Suitable grids are placed across the discharge openings 
leading from the agitating cells to the spitzkasten, which serve to 
break up eddy currents in the froth. 

1,084,210. January 13, 1914. A. C. Howard, London, England. As¬ 
signor to Minerals Separation, Limited, London, England. 

An apparatus for agitating and aerating liquids or pulps, com¬ 
prising an impeller, fastened to a vertical shaft, with radial blades 


OIL-FLOTATION PROCESSES 


41 


curved forward to accelerate the velocity of the pulp, and to create a 
suction that draws air down into the pulp. Baffles of square bars or 
expanded metal surround the impeller, and are used to break up the 
currents, leaving the surface quiet so the froth can float off from the 
agitating cell. 

1,088,050. February 24, 1914. Henry Ellsworth Wood, Denver, Colo¬ 
rado. (Ore-Concentrator.) 

An apparatus for the film flotation of ores comprising a settling 
tank in combination with a rotary drum submerged to near its top 
and having a longitudinally corrugated surface adapted to present a 
continuous surface film of water. When ore is fed onto the drum, the 
valuable minerals float on the film and are gently slid upon the sur¬ 
face of the water in the tank. The floating particles pass to the other 
end of the tank, where they come in contact with an endless belt to 
which they adhere and are carried out of the tank to be deposited in 
a suitable receptacle. 

1,093,463. April 14, 1914. Howard Hoyt Nutter, New York, N. Y., 
and Theodore Jesse Hoover, London, England. (Method and Ap¬ 
paratus for Ore Concentration.) Assignors to Minerals Separa¬ 
tion Limited, London, England. 

An improved apparatus for the flotation treatment of ores, com¬ 
prising a number of agitating cells in series, the connecting passages 
between the cells being provided with baffles so arranged as to de¬ 
flect and entrap below the surface whatever froth attempts to rise 
on the liquid. The entrapped froth is removed as desired. The ad¬ 
vantage of removing the froth before it reaches the free air surface 
lies in thus recovering the mineral that would be lost by the bursting 
of the tender bubbles as soon as they reach the surface, and in the 
removal of froth as soon as formed, thus preventing over agitation. 

1,094,760. April 28, 1914. Joseph T. Terry, Jr., San Francisco, Cali- 
fornia> (Process for Recovering Metalliferous Constituents of 
Ores.) 

A method of converting carbonate and oxide ores into sulphide 
form, thus rendering them amenable to treatment by flotation. The 
ore is preferably wet ground in a ball or tube mill to which hydrogen 
sulphide gas is admitted, after sulphizing, the pulp passes into a 
tank in which a vacuum is maintained to remove any surplus gas re¬ 
maining in the ore. The ore is then treated in any suitable flotation 
apparatus. 

1,098,668. June 2, 1914. Hovland & Frankfurter, Minneapolis, Min¬ 
nesota. (Art of Treating Metalliferous Materials.) 

Dry hydrogen sulphide gas will sulphidize metallic copper, its 
oxides, carbonates and silicates, as well as those of other metals, 
more rapidly than if gas is in solution. Ore is crushed to 60-mesh or 
under, and is revolved in a drum to which the gas is admitted, either 


42 


ABSTRACTS OF PATENTS 


under atmospheric or artificial pressure. Ten to twenty minutes is 
usually a sufficient time for sulphidization. Coarsely crushed ore 
may be sulphidized, in a similar manner, but a Ioniser time is re¬ 
quired. 

1,099,699. June 9, 1914. Henry Howard Greenway, Melbourne, Vic¬ 
toria, Australia. (Concentration of Ores.) Assignor to Minerals 
Separation Limited, London, England. 

A modification of process described in patent No. 962,678, con¬ 
sisting in mixing a powdered ore with neutral water containing in 
solution a minute quantity of an aromatic hydroxy compound, such as 
phenol, cresol or mixture of the two, agitating the mixture in the cold 
to form a froth and separating the froth. 

1,101,506. June 23, 1914. Leslie Bradford, Broken Hill, New South 
Wales, Australia. (Process for the Separation of Metallic Sulfids 
from Gangue and Apparatus therefor.) Assignor, by Mesne As¬ 
signments, to Minerals Separation Limited, London, England. 

A process of concentrating ores, which consists in mixing the ore 
with water to form a flowing pulp, adding to the pulp sufficient acid 
to bring about the evolution of gas by chemical action of the acid, 
subjecting the pulp and evolved gas therein to violent agitation, and 
then flowing the agitated pulp away from the place of agitation and 
separating the floating material. No oil is used. It is advantageous 
to heat the solution to about 140 degrees F. 

1,102,738. July 7, 1914. Henry Howard Greenway, Clare, South Aus¬ 
tralia, and Alfred Henry Piper Lowery, Prahran, Victoria, Aus¬ 
tralia. 

A process of differential flotation of metalliferous ores, which con¬ 
sists in the addition of a chromium salt, such as sodium or potassium 
bichromate, to the solution whereby certain sulphides are rendered 
amenable to flotation, while others are deadened and will not float. 

1.102.873. July 7, 1914. George Albert Chapman and Stanley Tucker, 
London, England. Assignors to Minerals Separation, Limited, 
London, England. 

A process for concentrating ores, which consists in first agitating 
a quantity of water with a modifying agent, such as cresol or the 
essential oils, out of contact with the ore so as to form an air emul¬ 
sion, and thereafter adding to the water the ore to be treated and 
agitating the same therewith so as to form a froth and separating 
the froth, resulting in decreasing the amount of frothing agents and 
acid required and a cleaner concentration of clayey ores. 

1.102.874. July 7, 1914. George A. Chapman, London, England. (Ore 
Concentration.) Assignor to Minerals Separation, Limited, Lon¬ 
don, England, a corporation of England. 

A process for concentrating ores, which consists in grinding the 
ore with water, in the presence of a modifying agent, such as any of 


OIL-FLOTATION PROCESSES 




the essential oils, so that the agent modifies the physical character¬ 
istics of the water, and then floating in the usual manner with the 
addition of a frothing agent. 

1,104,646. July 21, 1914. J. D. Fields, Butte, Montana. (Electrolytic 
Apparatus.) 

An improved cell for the electrolytic treatment of ores, especially 
copper, in which the metal is deposited from solution. 

1,104,755. July 21, 1914. John M. Callow, Salt Lake City, Utah. (Ore- 
Concentrating Apparatus.) Assignor to Metals Recovery Com¬ 
pany, Augusta, Maine, a corporation of Maine. 

An ore concentrating apparatus having a solution containing tank 
and a porous body therein through which fine streams of air under 
pressure are admitted into the solution from below, and a 'mechanical 
agitator operating just above the porous bottom in order to prevent 
the clogging of the pores by the accumulation of sand. 

1,106,195. August 4, 1914. Francis I du Pont, Wilmington, Delaware. 
Assignor to International Haloid Company, a corporation of 
Delaware. 

An apparatus for the separation of solids in liquids of great spe¬ 
cific gravity. The combination with a tank adapted to hold the sepa¬ 
rating liquid having an outlet from which the separated constituent 
is discharged, of a conveyor, a conduit through which the conveyor 
travels, means to heat the conduit, a condenser, a pipe leading to the 
condenser from the conduit at a relatively hot part of the latter, a 
vapor discharge from the condenser and a pipe leading from the vapor 
discharge to the conduit at a relatively cool part of the latter, and 
means to deliver material from the tank outlet to the conveyer, said 
tank, conduit and condenser being closed against direct connection 
with the external atmosphere. 

1,108,440. August 25, 1914. Edward James Horwood, Broken Hill, 
New South Wales, Australia. (Separation of Zinc-Blende and 
other Metalliferous Constituents from Ore Concentrates and 
Slimes by Flotation or Granulation.) 

An improvement over the process described in patent No. 1,020,353, 
whereby the ore is first subjected to a preliminary wash with pure 
water, so that the soluble salts are removed before subjecting the ore 
to the roast. In the subsequent flotation treatment less acid will be 
required than formerly was necessary. 

1,116,642. November 10, 1914. William Sydney Stevens, Magdelena, 
New Mexico. Assignor, by Mesne Assignments, to The Ozark 
Smelting and Mining Company, Cleveland, Ohio, a corporation of 
Ohio. 

The process of concentrating ore, which consists in mixing to¬ 
gether at a temperature of not less than 60 degrees C., crushed ore. 


44 


ABSTRACTS OF PATENTS 


sufficient water to form a flowing pulp, sulfuric acid not over 5 per 
cent by weight, and a mineral oil in amount only sufficient to perfer- 
entially coat the desired sulfide particles of the ore, not over 1 per 
cent, generally 3 to .6 per cent; and thereafter presenting the pulp 
to the air and then to the surface of a liquid to cause a flotation of the 
oiled sulfid particles by surface tension. 

1.124.853. January 12, 1915. John M. Callow, Salt Lake City, Utah. 
Assignor to Metals Recovery Company, Augusta, Maine, a corpo¬ 
ration of Maine. 

An ore concentrating apparatus having a solution-containing tank 
and a porous medium therein through which fine streams of air under 
pressure are admitted into the solution from below, a mechanical 
agitator operating in proximity to the upper surface of said medium 
for beating the air into the solution and maintaining the heavier con¬ 
stituents of the solution in suspension to thereby prevent the blanket¬ 
ing of the air outlets of said porous medium and suitable discharge 
openings for the froth and tailing. 

1.124.854. January 12, 1915. J. M. Callow, Salt Lake City, Utah. 
Assignor to Metals Recovery Company, Augusta, Maine. (Ro¬ 
tary Mixing Drum.) 

An apparatus for effecting the intimate mixing of water, finely 
divided ore and oil, comprising a rotating drum provided with an 
outer and inner shell, the space between the shells being divided 
into compartments, into which air or other gas may be introduced 
under pressure. The inner shell is porous to permit the passage of 
the air or gas into the interior of the drum. Suitable blades are 
fastened to the inner shell to assist in agitating the pulp and in con¬ 
veying it through the drum when it is being fed in at one end and dis¬ 
charged at the other end. 

1.124.855. January 12, 1915. John M. Callow and David J. Kelly, 
Salt Lake City, Utah. Assignors to Metals Recovery Company, 
Augusta, Maine, a corporation of Maine. (Ore-Separatory Ap¬ 
paratus.) 

An apparatus of the combination with a tank adapted to contain 
a mixture of powdered ores and water and a frothabie agent, of a 
hollow rotary member operable in the tank and adapted to receive a 
gaseous fluid under pressure, said member being sufficiently porous 
to permit the passage of the gaseous fluid therethrough but not the 
water and pulp. 

1.124.856. January 12, 1915. John M. Callow, Salt Lake City, Utah. 
Assignor to Metals Recovery Company, Augusta, Maine, a cor¬ 
poration of Maine. (Ore-Flotation Apparatus.) . 

An apparatus having a pulp-containing tank and a porous body 
therein through which streams of gaseous fluid under pressure are 
admitted into the solution from below, said porous body permitting 
the passage of the gaseous fluid but not pulp and water, and a re- 


OIL-FLOTATION PROCESSES 


45 


ciprocable carrier mounted in the tank and having elements operating- 
in proximity to the upper surface of said body for maintaining the 
coarser constituents of the solution in suspension to thereby prevent 
the blanketing of the outlets of said porous body. 

1,125,897. January 19, 1915. John M. Callow, Salt Lake City, Utah. 
Assignor to Metals Recovery Company, Augusta, Maine, a cor¬ 
poration of Maine. (Process of Concentrating Ores.) 

Apparatus for separating the metalliferous from the non-metal- 
liferous ingredients of an ore mass, the combination of a pulp re¬ 
ceptacle, means for forcing substantially uniformly distributed bubbles 
to the surface of said mass, and independent means for exhausting 
said bubbles from the upper surface of the pulp. 

1,126,965. February 2, 1915. Joseph W. Emerson, Salida, Colorado. 
(Process of Treating Ores.) 

The process of removing blende from blende-containing concen¬ 
trates which comprises submerging a body of such concentrates in a 
relatively deep body of an acid solution, mechanically engaging said 
particles as soon as they rise above the general plane of such body 
of concentrates and immediately removing them from the acid solu¬ 
tion, by means of a drag conveyor, the settled tailing being removed 
by another conveyor. 

1,134,690. April 6, 1915. Bernard MacDonald, Los Angeles, Califor¬ 
nia. (Apparatus for Separating Minerals by Flotation.) 

An apparatus for separating minerals by flotation comprising a 
receptacle, a launder adjacent to the receptacle into which the material 
passes from the receptacle, a vertically disposed transfer-pipe within 
the receptacle having a lower open intake end and an upper discharge 
end, a pipe entering the lower open end of the transfer-pipe, means 
for supplying compressed air to said last mentioned pipe and means 
for supplying oil to said last mentioned pipe. An adaptation of the 
Parral Tank to flotation. 

1,136,485. April 29, 1915. Charles E. Rork, Douglas, Arizona. (Flo¬ 
tation Machine.) 

A flotation apparatus comprising a horizontal shaft to which 
several paddle wheel agitators are fastened, each working in a separate 
chamber. The agitators splash the pulp out through a discharge open¬ 
ing near the top of each chamber, into a common settling tank, from 
which the floating mineral is recovered, while the gangue sinks and 
is drawn into the bottom of the next agitating chamber. This process 
is repeated until the tailing is discharged from the last chamber. 

1,136,622. April 20, 1915. Benjamin Sedgely Smith, Sydney, New 
South Wales, Australia. (Apparatus for the Wet Dressing of 

Sulfid Ores.) 

In combination, a surface tension separating table provided with 
means for flowing liquid therethrough, a screen thereover adapted to 


48 


ABSTRACTS OF PATENTS 


deliver a predetermined size of material to the table, a distributing^ 
screen close to and parallel with the surface of the liquid on the table, 
interposed in the path of material dropping from the primary screen 
and adapted to break the momentum thereof. 

1.140.865. May 25, 1915. R. F. Bacon, Pittsburg, Pa. Assignor to 
Metals Research Company, New York, N. Y. 

A process for the flotation treatment of ores, whereby colloidal 
sulphur is used to separate the mineral from the gangue. The finely 
divided ore is introduced into water containing a soluble sulphide, such 
as hydrogen sulphide, in solution. A reagent is then introduced which 
will react with the soluble sulphide to produce colliodal sulhpur, sul¬ 
phur dioxide is a satisfactory reagent. It is of advantage to use 
sufficient sulphur dioxide to make the solution faintly acid. In order 
to assist the flotation of the mineral, air may be introduced into the 
bottom of the flotation tank. In general it is not necessary to use oil 
or employ mechanical agitation, as the colloidal sulphur alone is able 
to effect the desired separation. 

1.140.866. May 25, 1915. Raymond F. Bacon, Pittsburg, Pennsyl¬ 
vania. Assignor to Metals Research Company, New York, N. Y. 

A method of sulphidizing oxidized ores to render them amenable 
to flotation whereby hydrogen sulphide gas is used to sulphidize the 
ore. Any excess of hydrogen sulphide in the pulp is then neutralized 
with sulphur dioxide, and the solution is rendered slightly acid before 
passing to the flotation machine. By this means an improved recovery 
of the sulphides is accomplished. Some ores give better separation if 
the solution is neutral or alkaline. 

1,141,377. June 1, 1915. John M. Callow, Salt Lake City, Utah. As¬ 
signor, by Mense Assignments, to Metals Recovery Company, a 
corporation of Maine. 

An apparatus comprising a number of agitating tanks, provided 
with porous bottoms for the admission of air. Agitation is accom¬ 
plished solely by air, no mechanical device being employed. Said tanks 
are arranged in series so that the tailing from one tank becomes 
the feed to the second tank and so on. A common overflow launder 
catches the froth, which may be sent to other tanks for further clean¬ 
ing. Provision is made for adding oil and acid to the pulp, before 
feeding it to the tanks. 

1,142,821. June 15, 1915. Henry Lavers, Surrey Hills, Victoria, Aus¬ 
tralia. Assignor to Minerals Separation, American Syndicate, 
(1913), Limited, London, England. 

A process of differential flotation of metallic sulfid ores, which 
consists in subjecting the ore to the action of a chromium salt in a 
slightly alkaline solution and to a flotation separation in a heated cir¬ 
cuit whereby a flotation product relatively high in certain sulfids and 
a residue relatively high in other sulfids are abtained. 


OIL-FLOTATION PROCESSES 


47 


1,143,797. June 22, 1915. Gunnar Sigge Andreas Appelqvist and Einar 
Olof Eugen Tyden, Stockholm, Sweden. (Process of Separating 
the Constituents of Rocks.) 

The process of separating constituents of rocks by the aid of oils 
which consists in treating the material to be separated in the form 
of a powder in dry condition with oils gasified by the application of 
heat, repeating at will the said treating operation, immersing the 
material thus treated into a liquid, agitating the mass, and allowing 
the different particles to separate from one another. 

1,147,633. July 20, 1915. Archibald R. Livingston, Canon City, Colo¬ 
rado. (Concentration of Minerals by Flotation.) Assignor to 
the New Jersey Zinc Company, New York, N. Y., a corporation of 
New Jersey. 

The method of separating floatable minerals from material with 
which they are associated, which consists in feeding the mixture into 
the body of water, contained within a rotating hollow cylinderical 
vessel which is provided with small short studs projecting out from 
the inner periphery of said cylinder, progressively raising it through 
the surface of the water at an angle greater than its natural angle 
of repose, washing down the emerging top layer by a jet of water, and 
floating the top layer thereby into the main body of water at the sur¬ 
face thereof and collecting the material thereby separated from that 
which sinks. 

1,151,117. August 24, 1915. Arthur J. Moxham, Wilmington, Dela¬ 
ware. (Ore Separating Process.) 

A process of separating solid constituents of different specific 
gravities in a heavy liquid, first treating the solids to reduce the spe¬ 
cific gravity of each of the solid constituents to the extent required 
to cause the separating liquid to have the desired specific gravity rela¬ 
tive to the specific gravity of each of the solid constituents, and then 
effecting the separation of the solid constituents in such separating 
liquid. 

1,155,815. October 5, 1915. Arthur Howard Higgins and William 
Warwick Stenning, London, England. Assignors to Minerals Sep¬ 
aration, Limited, London, England. 

Apparatus for concentrating ores by gaseous flotation of certain 
mineral particles in liquid, comprising, in combination, a vessel, means 
for introducing a gas therein at the lower part of the vessel, means 
for producing a zone of violent agitation and gasification in the lower 
part of the vessel, a baffle above the agitator for producing a quiescent 
zone in the upper part of the vessel, the baffle being inclined down¬ 
wardly from the inlet side to the outlet side of the vessel, an inlet for 
the pulp to the vessel below the baffle, means for removing the froth 
from the upper surface of the liquid, and an outlet for the residues 
above the baffle. 


48 


ABSTRACTS OF PATENTS 


1,155,816. October 5, 1915. A. H. Higgins, London, England. As¬ 
signor to Minerals Separation Company. 

An apparatus for the flotation treatment of ores, comprising a 
single chamber for both the agitating of the pulp and the removal of 
the froth formed. The lower part of the chamber contains the me¬ 
chanical agitator and pipes for the separate admission of compressed 
air and pulp. The upper part of the chamber is provided with a series 
of baffles which serve to bring the liquid to a state of comparative rest, 
so that the bubbles may rise to the surface, forming a froth that 
escapes through a peripheral overflow at the top. A suitable dis¬ 
charge opening is provided for the tailing. 

1,155,836. October 5, 1915. Thomas Mackellar Owen, Broken Hill, 
New South Wales, Australia. Assignor to Minerals Separation, 
American Syndicate, (1913), Limited, London, England. 

An apparatus for concentrating ores by gaseous flotation of cer¬ 
tain mineral particles in liquid, a single upright vessel open at the top 
comprising both an agitation and a separation vessel, an inlet conduit 
for ore pulp at the bottom of the vessel, an outlet conduit for tailings 
near the top of the vessel, a rotable agitator in the lower part of 
the vessel, a conduit for air leading into the lower part of the vessel, 
vertically elongated baffles immediately above the agitator terminat¬ 
ing at a substantial distance below the surface of the liquid in the 
vessel for producing a baffling zone above the atomizing zone, and a 
substantially quiescent topmost and separating zone above the baf¬ 
fling zone. 

1,155,861. October 5, 1915. Louis Albert Wood, London, England. 
Assignor to Minerals Separation, American Syndicate, (1913), 
Limited, London, England. 

A process of concentrating ores which consists in subjecting the 
powdered ore suspended in water free from frothing agents to the ad¬ 
mission of gas, by a mechanical agitator, disseminating the gas 
through the pulp in such a way that the gaseous bubbles preferentially 
attach themselves to certain mineral particles, and rise toward the 
surface and discharge their mineral load with the pulp, and catching 
and removing such discarded mineral below the surface of the liquid. 
1,156,041. October 5, 1915. G. C. Stone, New York, N. Y. Assignor 
to New Jersey Zinc Company, of New York, N. Y. 

An apparatus for concentrating minerals by flotation, comprising 
a tank having an overflow opening for collecting the floating minerals, 
and a bottom discharge gate for drawing off the settled gangue. The 
crushed ore is delivered from a bin to a carrier by an automatically 
operated gate. The carrier consists of a number of short, shallow 
parallel troughs fastened together. After receiving its load, the 
carrier moves down into the liquid in the tank in a direction nearly 
parallel with the surface of the liquid. The load is discharged and 
the carrier returns for another load. The ore thus being presented 
to the separating liquid in a series of fine streams and in a manner to 
create the least possible agitation is acted upon to the best advantage. 


OIL-FLOTATION PROCESSES 


49 


1,157,176. October 19, 1915. Thomas Mackellar Owen, Sydney, New 
South Wales, Australia. Assignor to Edward William Culver, 
Sydney, New South Wales, Australia. 

A process of preferential froth flotation separation of metallic 
sulfids from slimes, by augmenting the floative quality of certain 
sulfids in relation to certain other sulfids, by adding to and agitating 
with the pulp a limited proportion of alkaline permanganate. 

1,159,713. November 9, 1915. Lewis G. Rowand, Brooklyn, N. Y. 
Assignor to New Jersey Zinc Company, New York, N. Y., a cor¬ 
poration of New Jersey. (Separation of Minerals by Flotation.) 

The method of separating sulfids constituents from ores in which 
they are contained, which comprises feeding the solid particles of the 
ore in a finely divided condition upon a moving belt having on its sur¬ 
face a thin layer of oil, progressively feeding said layer with its charge 
of ore into a flotation liquid at the surface thereof, and floating off and 
recovering the floating sulfids. 

1,159,942. November 9, 1915. H. B. Hovland, Duluth, Minnesota. 
(Method of Sulphidizing Metals.) 

A process of sulphidizing metals, whereby the metal is first 
brought into solution in a suitable solvent and is then precipitated as 
a sulphide. As an example, an oxidized ore of copper is treated with 
sulphuric acid to dissolve the copper, which is then precipitated by 
the addition of calcium sulphide and ferric sulphate. The ferric sul¬ 
phate facilitates greatly the action of the calcium sulphide. 

1,162,291. November 30, 1915. M. Kraut, Bisbee, Arizona. (Feed¬ 
ing Mechanism.) 

An apparatus for providing a uniform and regular feed of oil, acid 
or other liquid to a flotation machine, comprising a revolving cylinder, 
partly immersed in the liquid to be used, and a scraper so arranged as 
to remove any desired amount of the liquid from the face of the drum 
or cylinder as it revolves. 

1,167,076. January 4, 1916. T. A. Janney, Garfield, Utah. (Ore- 
Concentrating Apparatus.) 

An apparatus for treating ores by the flotation process, com¬ 
prising an agitating chamber; a vertical shaft having agitating blades 
attached near the bottom and directly connected at the top, to an 
electric motor; and a spitzkasten into which the pulp flows from the 
agitator, and in which the separation of the floating mineral from 
the gangue takes place. 

1,167,835. January 11, 1916. D. H. Norris, San Francisco, California. 

An apparatus for separating the metallic and rocky constituents 
of ores, comprising a long vertical cylinder provided with a central 
feed pipe and a peripheral overflow at the top, and a discharge pipe 
at the bottom. At intervals along the cylinder openings are made and 
perforated pipes are introduced for the purpose of admitting air or 


50 


ABSTRACTS OF PATENTS 


aerated liquor to the interior. The ore pulp is fed in at the top, and 
floating particles pass out through the peripheral overflow, while the 
gangue sinks and is discharged at the bottom. 

1,170,637. February 8, 1916. E. A. Higgins, London, England. As¬ 
signor to Minerals Separation, Limited, London, England. 

A froth flotation process in which a class of compounds, never 
before used, is employed as a frothing agent. These compounds are 
the products derived from the treatment of organic bodies, such as 
oils, fats, alcohols, penols, etc., with sulphuric acid, and are known as 
^‘soluble oils.” 

1,170,665. February 8, 1916. E. H. Nutter, San Francisco, California. 
Assignor to Minerals Separation, Limited, London, England. 

A process of froth flotation, in which certain hydrocarbon frothing 
agents are treated with sulphuric acid, the products forming a cleaner 
concentrate and a more stable froth than the untreated frothing agents. 
The hydrocarbons used are those obtained in the treatment and re¬ 
fining of petroleum, kerosene, gas tar and the like, particularly in the 
refining of their distillates. 

1,174,737. March 7, 1916. F. B. Kollberg and M. Kraut, Bisbee, Ari¬ 
zona. (Flotation Machine.) 

A flotation machine comprising a long rectangular agitating cham¬ 
ber, in which a drum, provided with a series of longitudinal riffles on 
its face, rotates at a suitable speed. The ore and water are fed into 
the agitating chamber at such a rate as to keep the drum only slightly 
submerged in the pulp. Oil is added through oil supply pipes. The 
revolving drum picks up a thin layer of pulp, which is thrown off tan¬ 
gentially by centrifugal force in the form of a fine spray, thus receiv¬ 
ing excellent aeration, and is discharged through a suitable opening 
into a separating chamber or spitzkasten, where the froth is separated 
from the gangue. Additional aeration of the pulp is secured from 
air that enters the interior of the drum, and is forced out into the 
pulp through perforations in the face of the drum. 

1,176,428. March 21, 1916. John M. Callow, Salt Lake City, Utah. 
Assignor to Metals Recovery Company, Augusta, Maine. (Flota¬ 
tion Separatory Apparatus and Process.) 

The application of vacuum to the upper surface of what is com¬ 
monly known as a “Callow Cell” to draw air through the porous bot¬ 
tom for purposes of frothing. The froth runs into a chamber from 
which the air is trapped out. 

1,176,441. March 21, 1916. Ernest Gayford and George Crerar, Salt 
Lake City, Utah. Assignors to Metals Recovery Company, Au- 
guta, Maine. (Process of Concentrating Ores.) 

Process of alternate crushing and flotation, in steps, of an ore, 
one advantage being in not sliming the desired minerals excessively. 


(This Index was prepared by Prof. Hallet R. Robbins, Professor of Mining, Washington State College.) 

INDEX TO PATENTS 


Allen, A. A. 688,279 

Allen, H. A. 762,870 

Anderson, H. J. 414,962 

Appelqvist, G. S. A., and 

Tyden, E. O. E.1,143,797 

Bacon, R. F.1,140,865 

Bacon, R. F.1,140,866 

Bacon, R. F.1,180,816 

Ballot, J., Sulman, H. L., 
and Kirkpatrick-Picard, 

H. F. 835,120 

Ballot, J., Sulman, H. L., 
and Kirkpatrick-Picard, 

H. F. 835,479 

Ballot, J., Sulman, H. L., 
and Kirkpatrick-Picard, 

H. F. .. 879,985 

Behrend, S. K. 973,467 

Behrend, S. K. 979,820 

Blaine, W. S.1,032,732 

Blaine, W. S.1,032,733 

Block, H. (Assignee).... 709,593. 

Boley, D. C. 709,593 

Boss, M. P., and Van Meter, 

J. W. 762,774 

Boulton, H. E. (Assignee) 444,345 
Boulton, S. b! (Assignee) 444,345 
Bovee, M. W. (Assignee). 554,598 

Bradford, H. 345,951 

Bradford, L.1,101,506 

Broadbridge,^W., and How¬ 
ard, A. C.'.1,084,196 

Broken Hill Proprietary 

Co., Ltd. (Assignee)... 763,662 

Brown, C. H.1,081,360 

Brown, C. T. (Assignee).. 474,829 

Brumell, H. P. H. 678,860 

Callow, J. M.1,104,755 

Callow, J. M.1,124,853 

Callow, J. M.1,124,854 

Callow, J. M., and Kelly, 

D. J.1,124,855 

Callow, J. M.1,124,856 

Callow, J. M.1,125,897 

Callow, J. M.1,141,377 

Callow, J. M.1,176,428 

Cartwright, Z. 980,143 


Cattermole, A. E. 763,259 

Cattermole, A. E. 763,260 

Cattermole, A. E. 777,273 

Cattermole, A. E., Sulman, 

H. L., and Kirkpatrick- 

Picard, H. F. 777,274 

Cattermole, A. E., Sulman, 

H. L., and Kirkpatrick- 

Picard, H. F. 788,247 

Chapman, G. A., and 

Tucker, S.1,079,107 

Chapman, G. A., and 

Tucker, S.1,102,873 

Chapman, G. A.1,102,874 

Chemical Development Co. 

(Assignee) . 949,002 

Chemical Development Co. 

(Assignee) . 967,671 

Cole, D., and Thompson, 

A. W.1,180,089 

Colorado Iron Works Co. 

(Assignee) . 771,874 

Coplen, J. D. 397,585 

Crerar, G., and Gayford, E.1,176,441 
Crowder, S. (Assignee).. 575,669 
Culver, E. W. (Assignee) .1,157,176 

Darling, J. D. 763,859 

Darling, J. D. 795,823 

Darrow, W. E.1,156,276 

Davis, J. H. 679,473 

Davis, J. H. 816,303 

De Bavay, A. J. F. 864,597 

De Bavay, A. J. F. 912,783 

Delprat, G. D. 735,071 

Delprat, G. D. 763,662 

Delprat, G. D. 768,035 

Duggan, B. E. 889,300 

Dunagan, P. H. 244,569 

Dunagan, P. H. 404,521 

Dunstone, J. 956,800 

Du Pont, F. 1. 994,950 

Du Pont, F. 1.1,002,865 

Du Pont, F. 1.1,004,815 

Du Pont, F. 1.1,014,624 

Du Pont, F. 1.1,064,459 

Du Pont, F. 1.1,067,410 

Du Pont, F. 1.1,081,949 



















































52 


INDEX TO PATENTS 


Du Pont, F. 1.1,106,195 

Ellinger, E. (Assignee).. 667,222 

Elmore, A. S. 689,070 

Elmore, A. S. 692,643 

Elmore, A. S. 703,905 

Elmore, A. S. 865,334 

Elmore, F. E. 653,340 

Elmore, F. E. 676,679 

Elmore, F. E. 826,411 

Emerson, J. W.1,126,965 

Endlich, F. M. 461,425 

Evans, G. R. 502,902 

Everson, C. J. 348,157 

Everson, C. J., and Hebron, 

C. B. 471,174 

Everson, C. J. (Assignee). 474,829 
Finley, F. B., and Orr, 

H. L. 790,913 

Finley, F. B. 822,515 

Foote, A. D. W. 744,322 

Forland, T. R.1,078,779 

Frankforter, G. B., and 

Hovland, H. B.1,098,668 

Fusz, P. A. (Assignee).. 696,739 

Gabbett, E. R. 444,345 

Gale, D. 655,338 

Gayford, E., and Srerar, G.1,176,441 
Gesellschaft fur Elecktro- 
Osmose, M. B. H. (As¬ 
signee) . 1,156,715 

Gillies, J. H. 778,747 

Gillies, J. H. 780,281 

Gilmore, B. 554,598 

Glogner, M. F. R. 736,381 

Golden Gate Concentrator 

Co. (Assignee). 326,808 

Good, I. F. 745,960 

Goyder, G. A., and Laugh¬ 
ton, E. 763,749 

Goyder, G. A., and Laugh¬ 
ton, E. 784,999 

Grant, W. R. 771,874 


Gray, R., Jr. (Assignee).. 251,718 
Gray, R., Jr. (Assignee).. 267,351 

Greenway, H. H., Higgins, 

A. H., and Sulman, H. L. 962,678 

Greenway, H, H. and Lav¬ 


ers, H.1,064,723 

Greenway, H. H.1,099,699 


Greenway, H. _ H., and 

Lowry, A. H. P.1,102,738 

Greenway, T. J.1,045,970 

Harris, J. H. (Assignee).. 745.960 
Haywood, T. B. (Assignee) 444,345 

Hebbard, J.1,064,209 

Hebron, C. B., and Ever¬ 
son, C. J. 471,174 

Hebron, C. B. 474,829 

Higgins, A. H., Sulman, H. 

L., and Greenway, H. H. 962,678 
Higgins, A. H., and Sten- 

ning, W. W.1,155,815 

Higgins, A. H.1,155,816 

Higgins, A. H. . .1,170,637 

Hockley, E. A. 466,753 

Hoover, T. J. 953.746 

Hoover, T. J. 979,857 

Hoover, T. J., and Nutter, 

E. H.1,093,463 

Horwood, E. J.1,020,353 

Horwood. E. J.1,180,440 

Hovland, H. B., and Frank- , 

forter, C. B.1,098,668 

Hovland, H. B.1,159,942 

Hovland, H. B.1,164,188 

Hovland, H. B.1,164,189 

Howard, A. C., and Droad- 

bridge, W.1,084,196 

Howard, A. C.1,084,210 

Huff Electrostatic Separa¬ 
tor Co. (Assignee). 938,732 

Huff Electrosatic Separa¬ 
tor Co. (Assignee). 970,002 

Huff Electrosatic Separa¬ 
tor Co. (Assignee). 972,459 

Huff Electrosatic Separa¬ 
tor Co. (Assignee). 980,035 

Hutchinson, M. W. (As¬ 
signee) . 474,829 

Hyde, J. M.1,022,085 

Improved Paper Machinery 

Co. (Assignee).1,069,169 

Intercontinental Rubber 

Co. (Assignee).1,032,732 

Intercontinental Rubber 

Co. (Assignee).1,032,733 

International Haloid Co. 

(Assignee) .1,081,949 























































INDEX TO PATENTS 


5;i 


International Haloid Co. 

(Assignee) .1,106,195 

Ivery, J. W. 667,222 

Janney, T. A.1,167,076 

Jeffrey, R. H.1,052,061 

Jones, A. E. 251,718 

Jones, A. E. 267,351 

Kelly, D. J., and Callow, 

J. M.1,124,855 

Kendall, C. 771,075 

Kirby, E. B... 809,959 

Kirby, E. B. 838,626 

Kirkpatrick-Picard, H. F., 
Cattermole, A. E., and 

Sulman, H. L. 777,274 

Kirkpatrick-Picard, H. F., 
Cattermole, A. E., and 

Sulman, H. L. 788,247 

Kirkpatrick-Picard, H. F., 

and Sulman, H. L. 793,808 

Kirkpatrick-Picard, H. F., 

Ballot, J., and Sulman, 

H. L. 835,120 

Kirkpatrick-Picard, H. F., 

Ballot, J., and Sulman, 

H. L. 835,479 

Kirkpatrick-Picard, H. F., 

Ballot, J., and Sulman, 

H. L. 879,985 


Kirkpatrick-Picard, H. F., 

and Sulman, H. L.1,178,191 

Klein, J. 696,739 

Kollberg, F. B., and Kraut, 

M.1,174,737 

Kraut, M.1,162,291 

Kraut, M., and Kollberg, 

F. B.1,174,737 

Latimer, J. F. 851,599 

Latimer, J. F.851,600 

Laughton, E., and Goyder, 

G. A. 763,749 

Laughton, E., and Goyder, 

G. A. 784,999 


Lavers, H., and Greenway, 

H. H.1,064,723 

Lavers, H., and Nutter, 

E. H.1,067,485 

Lavers, H.1,142,821 

Lindley, C. N. (Assignee) 766,289 


Littleford, J. W.1,142,822 

Livingston, A. R.1,147,633 


Lockwood, A. A., and Sam¬ 
uels, M. R. A. 933,717 

Lockwood, A. A., and Sam¬ 
uels, M. R. A. 956,381 

Lockwood, A. A. 956,773 

Lockwood, A. A. 996,491 

Lockwood, A. A.1,043,850 

Lockwood, A. A.1,043,851 

Lowry, A. H. P., and 

Greenway, H. H.1,102,738 

Lucas, 1.1,175,366 

Lurie, J. S. 454,116 

Macay, J. F. N. 248,768 

MacDonald, B.1,116,308 


MacDonald, B.1,134,690 

MacGregor, F. S. 972,459 

Macquisten, A. P. S. 865,194 

Macquisten, A. P. S. 865,195 

Macquisten, A. P. S. 865,260 

McCoy, J. H. 577,825 

McGraw, A. (Assignee).. 244,569 
McLure, C. D. (Assignee) 696,739 

Merrill, C. W. 728,487 

Metallurgical Engineering 
& Process Corp. (As¬ 
signee) .1,156,372 

Metals Recovery Co. (As¬ 
signee) . 1,104,755 

Metals Recovery Co. (As¬ 
signee) .1,124,853 


Metals Recovery Co. (As¬ 
signee) .1,124,854 

Metals Recovery Co. (As¬ 
signee) .1,124,855 

Metals Recovery Co. (As¬ 
signee) .1,124,856 

Metals Recovery Co. (As¬ 
signee) .1,125,897 

Metals Recovery Co. (As¬ 
signee) .1,141,377 

Metals Recovery Co. (As¬ 
signee) .1,176,428 

Metals Recovery Co. (As¬ 
signee) .1,176,441 

Metals Research Co. (As¬ 
signee) .1,140,865 
















































54 


INDEX TO PATENTS 


Metals Research Co. (As¬ 
signee) .1,140,866 

Minerals Separation, Ltd. 

(Assignee) . 835,479 

Minerals Separation, Ltd. 

(Assignee) . 902,018 

Minerals Separation, Ltd. 

(Assignee) . 953,746 

Minerals Separation, Ltd. 

(Assignee) . 955,012 

Minerals Separation, Ltd. 

(Assignee) . 979,857 

Minerals Separation, Ltd. 

(Assignee) .1,064,209 

Minerals Separation, Ltd. 

(Assignee) .1,064,723 

Minerals Separation, Ltd. 

(Assignee) .1,067,485 

Minerals Separation, Ltd. 

(Assignee) .1,071,784 

Minerals Separation, Ltd. 

(Assignee) .1,079,107 

Minerals Separation, Ltd. 

(Assignee) .1,084,196 

Minerals Separation, Ltd. 

(Assignee) .1,084,210 

Minerals Separation, Ltd. 

(Assignee) .1,093,463 

Minerals Separation, Ltd. 

(Assignee) .1,099,699 

Minerals Separation, Ltd. 

(Assignee) .1,101,506 

Minerals Separation, Ltd. 

(Assignee) .1,102,873 

Minerals Separation, Ltd. 

(Assignee) .1,102,874 

Minerals Separation, Ltd. 

(Assignee) .1,142,822 

Minerals^Separation, Ltd. 

(Assignee) .1,155,815 

Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,142,821 

Minerals Separation Amer- * 

ican Syndicate (1913), 

Ltd. (Assignee).1,155,816 

Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,155,836 


Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,155,861 

Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,170,637 

Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,170,665 

Minerals Separation Amer¬ 
ican Syndicate (1913), 

Ltd. (Assignee).1,178,191 

Moller, W. 251,914 

Moxham, A. J.1,151,117 

Murex Magnetic Co., Ltd. 

(Assignee) . 996,491 

Murex Magnetic Co., Ltd. 

(Assignee) .1,043,850 

Murex Magnetic Co., Ltd. 

(Assignee) .1,043 851 

Murex Syndicate, Ltd. 

(Assignee) . 956,381 

New Jersey Zinc Co. (As¬ 
signee) .1,147,633 

New Jersey Zinc Co. (As¬ 
signee) .1,156,041 

New Jersey Zinc Co. (As¬ 
signee) .1,159,713 

Nibelius, A. W. 486,495 

Norris, D. H. 864,856 

Norris, D. H. 873,586 

Norris, D. H.1,167,835 

Northern Placer Machine 

Co. (Assignee). 942,663 

Nutter, E. H., and Lavers, 

H.1,067,485 

Nutter, E. H.1,071,784 

Nutter, E. H., and Hoover, 

T. J.1,093,463 

Nutter, E. H.1,170,665 

Ore Concentration Co. 

(1905), Ltd. (Assignee) 865,334 

Orr, H. L. 758,464 

Orr, H. L., and Finley, F. 

B. 790,913 

Orr, H. L. 937,325 

Owen, T. M.1,155,836 

Owen, T. M.1,157,176 

Ozark Smelting and Min¬ 
ing Co. (Assignee)-1,116,642 




















































INDEX To PATENTS 


Parker, H.1,069,1G9 

Parks, G. M., Co. (As¬ 
signee) .1,180,089 

Patterson, L. D. (As¬ 
signee) . 554,598 

Pettinos, G. F. (Assignee) 745,960 

Pohle, E. C. 811,085 

Potter, C. V. 776,145 

Potters’ Sulphide Ore 
Treatment, Ltd. (As¬ 
signee) .1,045,970 

Pachelman, S. 942,663 

Ramage, A. S. 949,002 

Ramage, A. S. 967,671 

Rice, B. W. 792,617 

Robinson, C.1,156,372 

Robson, G. 575,669 

Rork, C. E.1,136,485 

Rouse, A. M. 469,599 

Rowand, L. G.1,159,713 

Rowland, J. T. (Assignee) 251,718 
Rowland, J. T. (Assignee) 267,351 

Ruthenburg, M. 933,491 

Samuel, M. R. A., and 

Lockwood, A. A. 933,717 

Samuel, M. R. A., and 

Lockwood, A. A. 956,381 

Sanders, W. M. 805,382 

Sanders, W. M. 911,077 

Sanders, W. M. 988,737 

Sandon, J. 379,418 

Scammel, J. B. 770,659 

Schick, C.1,055,495 

Schwarz, A. 766,289 

Schwarz, A. 807,501 

Schwarz, A. 807,503 

Schwarz, A. 807,504 

Schwarz, A. 807,505 

Schwarz, A. 807,506 

Schwarz, A. 825,080 

Schwarz, A. 842,255 

Schwarz, A. H. 771,277 

Schwarz Ore Treating Co. 

(Assignee). 771,277 

Schwarz Ore Treating Co. 

(Assignee) . 807,501 

Schwarz Ore Treating Co. 

(Assignee) . 807,503 

Schwarz Ore Treating Co. , 

(Assignee) . 807,504 


Schwarz Ore Treating Co. 

(Assignee) . 807,505 

Schwarz Ore Treating Co. 

(Assignee) . 807,506 

Schwarz Ore Treating Co. 

(Assignee) . 825,080 

Schwarz Ore Treating Co. 

(Assignee) . 842,255 

Schwerin, B.1,156,715 

Sherwin-Williams Co. (As¬ 
signee) .1,081.360 

Smith, A. H.1,056,952 

Smith, A. H. 1,058,111 

Smith, B. S. ..1,014.977 

Smith, B. S.1,136,622 

Stenning, W. W., and Hig¬ 
gins, A. H.1,155,815 

Stevens, W. S.1,116,642 

Stone, G. C.1,156,041 

Strom, L. 968,206 

Sulman, E. A., and Sulman, 

H. L. 902,018 

Sulman, H. L., Kirkpat- 
rick-Picard, H. F., and 

Cattermole, A. E. 777,274 

Sulman, H. L., Kirkpat- 
rick-Picard, H. F. and 

Cattermole, A. E. 788,247 

Sulman, H. L., and Kirk- 
patrick-Picard, H. F. .. 793,808 

Sulman, H. L., Kirkpat- 
rick-Picard, H. F., and 


Ballot, J. 835,120 

Sulman, H. L. 835,143 

Sulman, H. L., Kirkpat- 
rick-Picard, H. F., and 

Ballot, J. 835,479 

Sulman, H. L., Kirkpat- 
rick-Picard, H. F., and 

Ballot, J. 879,985 

Sulman, H. L., and Sulman, 

E. A. 902,018 

Sulman, H. L. 955,012 

Sulman, H. L., Greenway, 

H. H., and Higgins, A. 

H. 962,678 

Sulman, H. L., and Kirk- 
patrick-Picard, H. F. ..1,178,191 

Sutton, J. W. 521,899 

Sweanor, G. 386,504 




























































INDEX TO PATENTS 


5() 


Terry, J. T., Jr.1,094,760 

Thayer, G. B., and Tobey, 

H. P. 326,808 

Thayer, G. B., and Tobey, 

H. P. 560,552 

Thompson, A. ^ W., and 

Cole, D.1,180,089 

Tobey, H. P., and Thayer, 

G. B. 326,808 

Tobey, H. P., and Thayer, 

G. B. 560,552 

Towne, R. S. 952,222 

Tucker, S., and Chapman, 

G. A.1,079,107 

Tucker, S., and Chapman, 

G. A.1,102,873 

Tunbridge, J. 207,695 

Tunbridge, J. 228,004 

Tunbridge, J.. . 777,159 

Tunbridge, V. (Adminis¬ 
tratrix) . 777,159 

Tyden, E. O. E., and Appel- 

qvist, G. S. A.1,143,797 

U. S. Graphite Co. (As¬ 
signee) . 679,473 


Van der Naillen, E. L. .. . 

737,533 

Van Meter, J. W., and 

Boss, M. P. 

762,774 

Wagner, H. J. 

373,113 

Ward, C. H. 

799,696 

Warne, E... 

268,325 

Wentworth, H, A. 

938,732 

Wentworth, H. A. 

970,002 

Wentworth, H. A. 

980,035 

Wheelock, C. F. 

734,641 

Williamson, G. R. (As- 


signee) . 

469,599 

Wolf, J. D. 

787,814 

Wolf, J. D. 

899,149 

Wolf, J. D. 

899,478 

Wolfe, J. W. 

725,609 

Wood, F. A. (Assignee),. 

554.598 

Wood, H. E. 

984,633 

Wood, H. E. 

987,209 

Wood, H. E. 

1.071,850 

Wood, H. E. 

1,088,050 

Wood, L. A. 

1,155,861 

Zehnder, B, (Assignee).. 

502,902 
































The Metallurgical Research 
Department 

Of the State School of Mines was established by the Legisla¬ 
ture in 1913. This Department was established for '^finding 
ways and methods of profitably treating low grade ores, of 
securing a higher percentage of extraction of metals from 
their ores, for obtaining other information that shall have 
for its object the benefit of the mining industry and utiliza¬ 
tion and conservation of the mineral resources of the state 
and for the publication and distribution of bulletins,^’ etc. 

By an agreement with the United States Bureau of 
Mines the work of this Department is under the direction 
of Metallurgists of the Bureau assigned to duty with head¬ 
quarters at the University of Utah. 

During the fiscal year 1915-1916 the following problems 
have engaged the attention of this Department: 

1. A study of the flotation processes in order to deter¬ 
mine their applicability to the treatment of ores that are not 
at present being treated by such processes, especially the 
low-grade lead carbonate ores of Utah. 

2. The hydrometallurgical treatment of low-grade and 
complex lead ores. 

3. The treatment of carbonate ores of zinc, especially 
with reference to the hydrometallurgical and igneous con¬ 
centration processes. 

4. A study of the effects of roasting on complex zinc- 
lead-iron-sulphide mixtures, with especial reference to the 
solubility of the various constituents of the ore after 
roasting. 

5. Electrolytic deposition of lead and zinc from their 
solutions. 

6. Cyaniding of refractory silver ores with especial 
reference to aluminum as a substitute for zinc in precipitat¬ 
ing gold and silver from cyanide solutions. 

7. Losses in milling processes. 




